83 low pressure lockout

4 flashes is a hard lockout, either due to high or low pressure issues. Most likely a low pressure lockout. Can't remember off the top of my head what 5 flashes is. Sounds to me like you probably have a bad defrost board and/or coil/ambient temperature sensor issues. These sensors rarely, if ever, actually go bad.

My Bryan Evolution shows heat pump fault code 83: Low pressure lockout; however, nothing seems to be wrong. The system is cooling just fine, no excessive humidity, and no funny sounds or fluids. What gives? Update: For anyone else with this problem—it turned out to be a faulty thermal expansion valve, which was covered under the warranty.The P70, P72, and P170 controls for low pressure applications are designed primarily for low pressure cut-out control, pump-down control, and capacity control on commercial refrigeration and air conditioning applications. These controls are available in several pressure ranges and are compatible with most common refrigerants.Low fuel pressure results in several issues for the engine, including rough idle, poor performance and decreased fuel economy. If the pressure is too low, the engine does not start...The lockout board works as such - the low and high lockout switches have an upper and lower range. The lockout board makes a flashing led indication when the psi measurements are within the upper/lower psi ranges on the switches. On the low level switch, if it gets to 25, the low cutoff will come on and lock out the board, until you do a …And an 83-LOW PRESSURE LOCKOUT 4 HOURS 9 EVENTS which occurred at 9:56AM. Submitted: 9 years ago. Category: HVAC. Show More. Show Less. Ask Your Own HVAC Question. Share this conversation. ... Carrier infinity system has code 83 low pressure and code 74 are these related in anyway. Technician ordered parts for code 74 but, I am …Lockout P70AB-12 MICRO-SETTM Low Pressure Control. The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office. ... 83 13/16 20 2-13/16 71 1-11/16 1-3/4 43 44 p70_low_NEMA1_dims.eps Dimensions for Low Pressure ...My carrier furnace is a piece of, kept kicking off so with the 21 and the 44 code the blower fault and lockout. Guy - Answered by a verified HVAC Technician. We use cookies to give you the best possible experience on our website. ... Carrier infinity heatpump gives fault code 83 low pressure.Low Ambient Lockout. Issue: What is Low Ambient Lockout? Resolution: This is a user enabled feature that prevents a unit from starting whenever the ambient temperature is below a specific setpoint. The factory default of the feature is "Disabled", and the setpoint range is between -20 (20 below zero) and 40 F. The factory default is 20 F.

Thermostat calls for heat motor starts at low rpm for few minutes then shuts - Answered by a verified HVAC Technician. We use cookies to give you the best possible experience on our website. ... carrier infinity heatpump gives fault code 83 low pressure lockout for 4 hours. ...A957_O Low Refrigerant Pressure System has tripped the low pressure threshold 3 times in one call. Unit will be locked out for one hour Check Refrigerant Charge Check for Restrictions in liquid or suction lines, drier, strainers etc. T958_O High Refrigerant Pressure System High pressure switch has opened.I have a Carrier Infinity Greenspeed heat pump, installed in July-2015, that has a "System Fault" message: "83-Low Pressure Lockout For 4" We are in the middle of a pretty serious snowstorm here in Ma … read moreIssued September 2018. The P70, P72, and P170 controls for low pressure applications are designed primarily for low-pressure cut-out control, pump-down control, and capacity control on commercial refrigeration and air conditioning applications. These controls are available in several pressure ranges and are compatible with most common refrigerants.I have a Carrier Infinity Greenspeed heat pump, installed in July-2015, that has a "System Fault" message: "83-Low Pressure Lockout For 4" We are in the middle of a pretty serious snowstorm here in Ma … read more

Lennox HVAC in florida immediately goes from normal to low pressure fault in cool or heat mode as indicated by the defrost board leds. Unit has been running fine for over 2 years. M/N: XP13-030-230-03. S/N: 5808D14429. Don't have a pressure tester but I have the knowledge and equipment to test anything electrical.Pressure at Transducer has fallen below settings. 50 PSIG for Cooling and 15 PSIG for Heating modes Check Refrigerant Charge Check for Restrictions in liquid or suction lines, drier, strainers etc. Check airflow and load at evaporator A957_O Low Refrigerant Pressure System has tripped the low pressure threshold 3 times in oneThe expansion vessel is responsible for accommodating the expansion of water as it heats up. If it fails, the pressure within the system can drop, causing a low-pressure lockout. Solutions for Low-Pressure Lockout Check for Leaks and Repair. Begin by inspecting all visible components of your heating system for signs of leakage.In this video, Tim Smith demonstrates the proper procedure for diagnosing a faulty low pressure cutout (or low pressure switch) on a residential AC.Is the in...

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Customer: ***** ***** Bruno. My Carrier Infinity message is "83-low pressure lockout 4 h". We are in the middle of that Atlantic blizzard with lots of snow. I cleared the snow from the unit outside, b … read moreMost boilers will shut down if the pressure drops below 0.6 bar or higher than 3 bar. You can raise the boiler pressure by filling the filling loop with water. You can also reduce the pressure by bleeding the radiator valves. No power. A power outage can also cause a boiler lockout.• Resolved an issue where diagnostic code (32-59) "Low Pressure Lockout" was incorrectly activated. • Resolved an issue where diagnostic code (39-15) "Unexpected Fan Shutdown" was incorrectly ... Enhanced performance where (83-57) "VFD Compressor Lockout - Current 1" was erroneously set Version 3.0 (May 2020)My carrier furnace is a piece of, kept kicking off so with the 21 and the 44 code the blower fault and lockout. Guy - Answered by a verified HVAC Technician. We use cookies to give you the best possible experience on our website. ... Carrier infinity heatpump gives fault code 83 low pressure.LOW WATER PRESSURE SWITCH (LWPS) (P/N 83223 & 83223-1) TESTING PROCEDURE NY Thermal Inc. Technical Assistance: 1 -800 688 2575 Fax: 1-506-432-1135 ... If the Ti/Lx boiler fails to lock out when the water pressure is reduced 8PSI, lower the pressure to 5PSI and try again,Found a customer with a Carrier Infinity HVAC system. Thermostat error reads 81 Thermal lockout, low stage, 4 hours. This can be a few things from a syste...

Lennox XP13 Heat Pump: Heating Re: High Pressure Fault/Lockout There are two different High Pressure Indications: A High Pressure Fault occurs when the Hi Pressure Switch opens and is indicated by a Slow Flashing Green LED on the outdoor unit control board.. A High Pressure Lockout occurs after the 5th High Pressure Fault during a single compressor cycle and is indicated by a Solid On Green ...When it's cold outside, I have wary low hot air pressure. Is that's normal? Last night outside temperature was 10 degree Faraingait, and system stop working and give me the message that "System malfunction, call technician" and I have to turn my oil heat on. ... 83-Low Pressure Lockout 4 Hours (1 ewent) 32-Low Pressure swith open (2 ...In your process of looking for the best pressure washer for your home cleaning project, you might have come across Alkota Pressure Washer—a brand that Expert Advice On Improving Yo...On the Envision models the low pressure lockout led besides the obvious may also be an indicator of a ComfortAlert fault. The ComfortAlert box flashes its own led with a code if it sensed a fault condition. One CA fault code is 18 hr consecutive run time but that alone should not cause a lockout. Most of the other CA fault codes are voltage and ...Ou low pressure switch strikes lockout, Lennox, 2-3 years, The problem started on August 4th. I shut down the unit. - Answered by a verified HVAC TechnicianAPJ Abdul Kalam is no more. Avul Pakir Jainulabdeen Abdul Kalam—India’s 11th president and its most famous rocket scientist—has died. Kalam, who was 83 years old, reportedly suffer... Low refrigerant charge could cause it. If you're running it in cool mode, a bad blower or dirty filter could cause it. Only thing I can advise you to do it turn off the breakers for the indoor and outdoor units for a few minutes, turn it back on, and see if the issue goes away. 83: Low Pressure Lockout: Amber: 84: High Pressure Lockout: When to Get a Technician for KeepRite Air Conditioner Repairs. Although you may be able to effectively diagnose the source of your KeepRite air conditioner's problem, it's typically considered more advisable to contact a certified HVAC technician when it comes to performing the ...That is a very low pressure that can cause a lot of problems including freeze up. Your best bet is the shut unit down so all the pressures equalize, take some dish soap and water and make yourself some soap bubbles. ... working on a lennox puls gas furnace. after the stat is satisfied the furnace goes into lockout. i have checked pressure ...3. In instances where a water pressure regulator will be provided on the make-up water line, the pressure regulator should be adjusted to provide at least 12 psi (81.8 kPa) at the highest point in the heating loop. 4. Bleeding devices located on radiators units (all radiators all devices) should be opened. 5.Today, it is the 3rd lockout in a raw. Static pressure shows 0.34in, blower at 666RPM and airflow 731CFM. (during lockout, electric heat stage 1) Outdoor coil temperature shows 13, and outdoor temperature -9 (this one should be celsius). Originally Posted by pacnw. Any cover needs to be at MINIMUM 4 feet above the unit.

What you can do is shut the power off to the furnace and then turn it back on that should reset the fault code for the pressure switch lock out. JACUSTOMER-517iiegr- : I have swiched power off with cb and back on with no luck--this is a lennox heat pump a/c unit

Hi. I keep keep getting lock out messages on both my units. One is a heat pump the other is air conditioner. I also get a similar message in the winter time for the furnace. ... carrier infinity heatpump gives fault code 83 low pressure lockout for 4 hours. ...My technical question is whether the "Code 83 Low Pressure Lockout 4 Hours" alert could be triggered by a leaky or faulty compressor unit on the Heat Pump itself. Any details you can give would be helpful as I further my troubleshooting before I need to call a Bryant technical resource.Thus, the compressor’s low-pressure cutout trips and causes a low-pressure lockout. Inadequate airflow in the indoor unit: Sometimes, the indoor and evaporator coil gets clogged up with dirt. It may happen due to the dirty filters as well. As a result, the indoor unit will not get enough air in the system. This will cause the system to ...Power down your AC. Start at your circuit breaker panel and flip the breaker that powers your AC. Find the button. Most air conditioning units are equipped with a reset button. Hold down the reset button for 3 to 5 seconds and then release. Restore power to your AC.Lockout P70AB-12 MICRO-SETTM Low Pressure Control. The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office. ... 83 13/16 20 2-13/16 71 1-11/16 1-3/4 43 44 p70_low_NEMA1_dims.eps Dimensions for Low Pressure ...Gainers Fast Radius, Inc. (NASDAQ:FSRD) shares surged 106.3% to close at $0.21 on Wednesday after dipping around 48% on Tuesday. Fast Radius est... Indices Commodities Currencies...That is a very low pressure that can cause a lot of problems including freeze up. Your best bet is the shut unit down so all the pressures equalize, take some dish soap and water and make yourself some soap bubbles. ... working on a lennox puls gas furnace. after the stat is satisfied the furnace goes into lockout. i have checked pressure ...

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Low Pressure 3-Way Switching. Trunnion-style 83 and H83 series ball valves provide durable service in high- and low-pressure applications. They feature a compact, maximum-flow design, low operating torque, and wide temperature range, and can be ordered with ECE R110-type approval. ... Features: Limits access to manually actuated valves; Lockout ...That is a very low pressure that can cause a lot of problems including freeze up. Your best bet is the shut unit down so all the pressures equalize, take some dish soap and water and make yourself some soap bubbles. ... working on a lennox puls gas furnace. after the stat is satisfied the furnace goes into lockout. i have checked pressure ...High pressure and low pressure lockout settings. Published 10/17/2019 01:17 PM | Updated 01/04/2022 01:07 AM . How many trips before the controller locks out on high/low pressure trips? Lockout will occur after 3 trips within 24 hours. See AE8-1436 for more information. Was this answer helpful? ...Ran into a Lennox xp14 heat pump with matching 4 ton cased coil. Kicking out on low pressure fault. Pressure tested the indoor coil and lineset, then the condesor. Held at 400 psi hours. Charged the system back with 410a, and ran in cooling, was getting around 20-30 on the suction side and about 180-190 on liquid side. And the indoor was …Heat Pumps and Electric Home Heating - Low Pressure Lockout + High Pressure Fault Codes: No Heat Pump - My electric bill is very high and found that my heat pump system is using Aux heat full time. I have a 7 year old Lennox 14HPX-036-230-19 outdoor unit; the manual is ** Here ** (1) The compressor/condenser, the red/grMay 23, 2014 · Thread: Carrier infinity 25hna - code 83 low pressure lockout 4 hours - cooling mode only. Thread Tools. Show Printable Version; 05-23-2014, 08:34 PM #1. Eric Séguin. I have a 2 yr old Carrier Infinity heat pump, 20 SEER, that gave me a system fault of 84, high pressure lockout for 4 hrs. I did have a dirty filter and changed it. Coils are clean, but I can do a qui …Do you find yourself constantly frustrated with low water pressure in your home? Whether it’s a weak shower, slow-filling toilet, or inadequate water flow in your kitchen sink, low...Was out combining yesterday and still getting low pressure lockout. So I added another 0.8 lbs yet my gauges still show 20 psi/125 psi at 80f and so seems to indicate more freon needed. ... Case 2388 air conditioning low pressure - School Of Hard Knock: 8/8/2021 23:32; RE: Case 2388 air conditioning low pressure - SDman: 8/8/2021 23:41; RE ...Pull the charge and weigh it. R600a liked this post. I got to a no cooling job where a Mitsubishi PU12EK unit had really low pressure (35.7 and 50.6). WB was 61 and DB was 81, the superheat was around 47 and there was no subcooling. Suction temp was 62 and the liquid temp was 41.9013FSG2J21M4 Air-Pump Pressure Switch, NEMA 1, 30-50 psi Pressure Setting, 20-65 psi Cut-Out, 15-30 psi Adjustable Differential, Low-Pressure Cut-Off. 313. $3339. FREE delivery Thu, Feb 8. Or fastest delivery Tue, Feb 6. Only 8 left in stock - order soon.Unit is a geothermal setup which has been having winter issues since install 5-6 years ago. It would get low pressure lockouts on very cold/freezing days. A tech replaced the low pressure sensor and it worked like a champ all winter, the most efficient it's ever run. Now with warmer weather and switching to cooling and it essentially locks out ... ….

Low Pressure Switch Lockout: Slow Flash: Off: High Pressure Switch Fault: On: Off: High Pressure Switch Lockout: Lennox MS8 Heat Pump Troubleshooting. Problem Possible Cause; Unit does not operate immediately when restarted. Unit control initiates a 3-minute delay at the end of each cycle to protect the compressor from damage.Saf-T-Cart SC2FNNP-12 Cylinder Cap, Low Pressure, 3 1/2", Steel, Yellow: Industrial Lockout Tagout Devices: Amazon.com: Industrial & ScientificI suggest turning the unit off immediately, bypassing the low pressure cut out switch forces the unit to run when it is out of gas, if the leak is on the evaporator side, it will suck itself full of air and that can ruin the compressor. you can send a photo of the wiring diagram just like you did with the pressure switch you do not need to add ...Last couple of days. We had a very low cold spell in NY last week. I noticed the was switching to the furnace an inordinate amount of time. Went to check it, the compressor was locked out. Contractor's Assistant: Is there anything else the HVAC Tech should know before I connect you? Rest assured that they'll be able to help you. That's all.A blocked or dirty filter will impede airflow, causing the system to work harder to maintain temperature, which can trigger a low pressure lockout. You can usually find the filter located near the return air duct or within the indoor unit of the HVAC system. If it appears dirty or clogged, it needs to be either cleaned or replaced.The # 83 is a low pressure hard lockout for 4 hours and "in the event of a low pressure trip or low pressure lockout, check the refrigerant charge and indoor airflow in cooling and outdoor fan and coil in heating mode. Last edited by second opinion; 12-17-2013 at 07:29 PM. Reply . 12-18-2013, 11 ...A hard lockout on a Trane heat pump can be caused by several factors, including: 1. Low refrigerant charge: A low refrigerant level can cause the system to overheat or freeze, leading to a hard lockout. Check for refrigerant leaks and recharge the system if necessary. 2.Join Date Dec 2002 Location Houston,Texas Posts 23,018 Post Likes Likes (Given) 3999 Likes (Received) 4178 Dislikes (Given) 4 Dislikes (Received) 14The pressure is too low. That's probably why you're getting the low water lock out. There is a device called a feed valve which is supposed to automatically keep the pressure near 15 psi. Apparently it's malfunctioning assuming the system is not full of antifreeze and the water into the system is off. Either way you need to call a plumber.Carrier infinity heatpump gives fault code 83 low pressure. carrier infinity heatpump gives fault code 83 low pressure lockout for 4 hours. ... 83 low pressure lockout, The pressure is too low. That's probably why you're getting the low water lock out. There is a device called a feed valve which is supposed to automatically keep the pressure near 15 psi. Apparently it's malfunctioning assuming the system is not full of antifreeze and the water into the system is off. Either way you need to call a plumber., Carrier Infinity System, Code 83-Low Pressure Lockout, Technician cleaned outside and inside coils, replaced filter, - Answered by a verified HVAC Technician., From https://www.justanswer.com/ythiJustAnswer Customer from Greenfield, Indiana: 83 low pressure lockoutPearl Wilson: Assistant: What's the brand and model ..., Feb 27, 2018 · Low Pressure Switch. The heat pump is equipped with a low-pressure switch which is connected to the control at the LPS terminals. If the low-pressure switch opens for more than five seconds, the control will cause a soft lockout condition and display the appropriate fault codes. The control will ignore the low pressure switch input and not ... , Here are the common culprits: Refrigerant Leaks: If there’s a leak in the refrigerant line, the pressure will naturally fall, activating the lockout feature. This leak could be anywhere— from the coils to the line sets connecting the indoor and outdoor units. Faulty Sensors: Your AC system uses sensors to monitor pressure., Carrier infinity heatpump gives fault code 83 low pressure lockout for 4 hours. We start the AC at 76. Outside temp - Answered by a verified HVAC Technician, We have observed the following faults: • 84-High pressure lockout 4 hours. • 83-Low pressure lockout 4 hours. Fault behavior: • Unit will put out cold air for a period of time, varying from 15 minutes to a couple hours. • After this, the unit will stop putting out cold air and one of the above fault codes will appear., 82 High Stage thermal lockout (4 HRS) 83 Low pressure lockout (4 HRS) 84 High pressure lockout (4 HRS) Short flashes indicate the first digit in the status code, followed by long flashes indicating the second digit of the status code. 3, Pause ODU Fan Delay Defeat Not Active, Low Pressure Switch. If the low-pressure switch opens for more than five seconds, the control will cause a soft lockout condition and display the appropriate fault codes. If four LPS openings occur within a twelve-hour period, it causes a hard lockout which can be reset by cycling system power, or by shorting the TEST pins for more than 2 seconds., Suction Over Temp Lockout: 83: 4 Hours: Low Pressure Lockout for 4 hours: 84: 4 Hours: High Pressure Lockout for 4 hours: 85: 15: Fan Inverter Temp Lockout: 86: 15: Fan Inverter Current Lockout: 88: 2 Hours: Inverter Temp Lockout: 89: 15: Compressor Inverter Overcurrent Lockout: 91: 15: Inverter VDC-Out Over Voltage Event: 92: 15:, I have a 2 yr old Carrier Infinity heat pump, 20 SEER, that gave me a system fault of 84, high pressure lockout for 4 hrs. I did have a dirty filter and changed it. ... our system says system malfunction alert 83 / low pressure lockout 4hrs 3 events active. and the word active is flashing how do we fix it? ..., The evaporator temperature of my central air system is high and not cooling is around 115 degrees with air flow and 60 degrees with no air flow. … read more. airheatman. HVAC Technician. 6 years college. 19,130 satisfied customers., Suction over Temp Lockout or Thermal cutout occurs in three consecutive high/low stage cycles: 83: Low Pressure Lockout for 4 hours: 84: High Pressure Lockout for 4 hours: 85: Compressor Temp Lockout: 86: Inverter Cable Fault: 88: Inverter Temp Lockout: 91: Inverter VDC-Out Over Voltage Event: 92:, From https://www.justanswer.com/ythiJustAnswer Customer: Carrier Infinity SystemPearl Wilson: Assistant: Do you know the model of your Carrier HVAC unit?Pear..., If the low pressure switch was defective, a pressure switch did not open status code would be flashing, so the answer is YES. We go to Step 2. 2 19 2. Step 2 asks the question, “Is the AMBER LED status light blinking rapidly without a pause?”. If the low pressure switch was defective, a pressure switch did not open status code would be, Join Date Dec 2002 Location Houston,Texas Posts 23,018 Post Likes Likes (Given) 3999 Likes (Received) 4178 Dislikes (Given) 4 Dislikes (Received) 14, October 22, 2023 by GEGCalculators. The heat pump lockout temperature typically ranges between 30-40°F (-1 to 4°C) in mild climates, 20-30°F (-6 to -1°C) in moderate climates, 10-20°F (-12 to -6°C) in cold climates, and below 10°F (-12°C) in very cold climates. This temperature represents the point at which a heat pump switches to a ..., RESULT: High pressure switch trip. Check refrigerant charge, outdoor fan operation and coils for airflow restrictions. CODE: 32. ... CODE: 83. RESULT: Low pressure switch trip has occurred during 3 consecutive cycles. Unit operation locked out for 4 hours or until 24v power recycled. CODE: 84., 45 82 Thermal lockout Control Fault 46 83 Low pressure lockout 53 Outside Temp Sensor Brown out (24V) 84 High pressure lockout FLASH CODE FAULT DEFINITIONOUTDOOR COIL THERMISTOR Thermal Cutout AUXR Contactor Shorted No 230V at Compressor 32 Low Pressure Switch 55 Coil Temp Sensor, The economic or defensive lockout is employer instituted to prevent economic losses due to a threatened union strike. The second type of lockout is due to a Supreme Court decision in NLRB vs. Brown Food Store (380 U.S. 278, 1965). The decision lets employers replace union workers with temporary employees when there is a multi-employer ..., 4 flashes is a hard lockout, either due to high or low pressure issues. Most likely a low pressure lockout. Can't remember off the top of my head what 5 flashes is. Sounds to me like you probably have a bad defrost board and/or coil/ambient temperature sensor issues. These sensors rarely, if ever, actually go bad., Low Stage Thermal Cutout: 72: High Stage Thermal Cutout: 73: Contactor Shorted: 74: Contactor Open (No 230v to Comp) 81: Low Stage Thermal Lockout (4 HRS) 82: High Stage Thermal Lockout (4 HRS) 83: Low Pressure Lockout (4 HRS) 84: High Pressure Lockout (4 HRS), Hey guys, I have a 3 year old Carrier Infinity heat pump. Over the past 30 days, it has started raising the following errors: 83 - Low Pressure Lockout 4 Hours 32 - Low Pressure Switch Open The system is a 4-zone, 4.5 ton system. The system does not consistently raise the error, and when the heat pump runs, it blows warm air. When the system raises the error, there is no ice on the outside ..., Code 83 Low pressure lockout - 4hrs. Code 84 High pressure lockout - 4hrs. Dave Reply . 06-28-2008, 02:18 PM #3. kkmcewen. View Profile View Forum Posts, Very Low Evaporator Refrigerant Pressure diagnostic may be annunciated after performing a circuit lockout. Unlike previous products, even if the circuit associated with the suction pressure is locked out, it will not defeat the protection afforded by this diagnostic. To continue with the Circuit Lockout without the diagnostic, unplug the ..., May 19, 2021 · I checked the board, and the status light is showing code 83, low-pressure lockout. Before I call in the service tech, what steps can I take tot try and isolate (and potentially fix) the problem myself? , Carrier infinity heatpump gives fault code 83 low pressure. carrier infinity heatpump gives fault code 83 low pressure lockout for 4 hours. ... inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent. Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified ..., Low Stage Thermal Cutout: 72: High Stage Thermal Cutout: 73: Contactor Shorted: 74: Contactor Open (No 230v to Comp) 81: Low Stage Thermal Lockout (4 HRS) 82: High Stage Thermal Lockout (4 HRS) 83: Low Pressure Lockout (4 HRS) 84: High Pressure Lockout (4 HRS), Air Conditioning and Cooling Systems - Lennox hp26-024-7p pressure switch lockout - I have a Lennox hp26-024-7p that stopped working. I could manually press the contactor to start the compressor and condenser fan, but it would not stay running. We replaced the contactor, now it's showing a pressure switch lockout fault, RESULT: Low Pressure Switch Open. FIX: Low – pressure switch trip. Check refrigerant charge and indoor air flow. CODE: 45. RESULT: Control Fault. FIX: Outdoor unit control board has failed. Control board needs to be replaced. ... FIX: Thermal Lockout occurs in three consecutive high/low stage cycles. High stage locked out for 4 hours or until ..., Carrier infinity heatpump gives fault code 83 low pressure. carrier infinity heatpump gives fault code 83 low pressure lockout for 4 hours. ... Thanks. I have Carrier ac showing a low pressure switch alert. The unit runs, but doesn't cool. Anything you can tell me to help? ..., 83 low pressure lockout. Carrier. About 4 hours. I replaced the air filter. The unit is about 3 yrs old - Answered by a verified HVAC Technician, by BanditHollow. 83-low pressure lockout 4 hours. Got the above message on a ~10 year old Carrier AC system. Any idea what might be causing this? Or do I just call a pro. 2 …