Question about Carrier 38BRC036 Air Conditioner

1 Answer

24ABR348A0031010 compressor starts then stops. Carrier 4 ton R22 unit. Worked great, then fan runs all the time. Compressor will start for less than a minute, then stop. Basically compressor will not stay running. Capacitor tests good. Considering hard start kit. Freon levels seem to be correct. But without compressor running hard to get a decent reading. Not running high side has pressure. 150 to 175 psi. Low side has pressure too, 30 to 60psi. At first we thought it leaked down, but now am pretty sure no freon was lost. Going to do a recover tomorrow and weigh what I recover. I guess then reload correct amount. But really want to get compressor to run all the time.

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  • 5 more comments 
  • do-it-myself Jul 19, 2010

    Okay - Have an allstyle coil system in attic. R22 Non-Bleed TXV Expansion valve. Valve is Emerson RP31073 and confirmed with Allstyle that the valve should allow me to simply blow through the valve and should be open
    at atmoshpere when not connected. This valve is blocked solid at room temp with nothing connected.
    I cannot blow air through the valve. So we think we should replace the expansion valve. Do you agree?

  • do-it-myself Jul 20, 2010

    Removed Expansion Valve - Emerson RP31073. Non-Bleed. Valve is completely blocked and no air passes through at room temp. Called Allstyle that makes the expansion coil system in attic. Their tech says valve should pass air when at rest. Do you agree ? Am getting a replacement valve in a couple days. The store had a generic but I insisted on a direct replacement Emerson, it is a bolt in replacement. The generic needs some fittings attached. So we think the valve caused the blockage. Will reinstall. Pull vacuum, release freon stored in the compressor.

  • do-it-myself Jul 20, 2010

    Removed Expansion Valve - Emerson RP31073. Non-Bleed. Valve is completely blocked and no air passes through at room temp. Called Allstyle that makes the expansion coil system in attic. Their tech says valve should pass air when at rest. Do you agree ? Am getting a replacement valve in a couple days. The store had a generic but I insisted on a direct replacement Emerson, it is a bolt in replacement. The generic needs some fittings attached. So we think the valve caused the blockage. Will reinstall. Pull vacuum, release freon stored in the compressor.

  • do-it-myself Jul 20, 2010

    Removed Expansion Valve - Emerson RP31073. Non-Bleed. Valve is completely blocked and no air passes through at room temp. Called Allstyle that makes the expansion coil system in attic. Their tech says valve should pass air when at rest. Do you agree ? Am getting a replacement valve in a couple days. The store had a generic but I insisted on a direct replacement Emerson, it is a bolt in replacement. The generic needs some fittings attached. So we think the valve caused the blockage. Will reinstall. Pull vacuum, release freon stored in the compressor.

  • do-it-myself Jul 20, 2010

    Removed Expansion Valve - Emerson RP31073. Non-Bleed. Valve is completely blocked and no air passes through at room temp. Called Allstyle that makes the expansion coil system in attic. Their tech says valve should pass air when at rest. Do you agree ? Am getting a replacement valve in a couple days. The store had a generic but I insisted on a direct replacement Emerson, it is a bolt in replacement. The generic needs some fittings attached. So we think the valve caused the blockage. Will reinstall. Pull vacuum, release freon stored in the compressor.

  • do-it-myself Jul 20, 2010

    Removed Expansion Valve - Emerson RP31073. Non-Bleed. Valve is completely blocked and no air passes through at room temp. Called Allstyle that makes the expansion coil system in attic. Their tech says valve should pass air when at rest. Do you agree ? Am getting a replacement valve in a couple days. The store had a generic but I insisted on a direct replacement Emerson, it is a bolt in replacement. The generic needs some fittings attached. So we think the valve caused the blockage. Will reinstall. Pull vacuum, release freon stored in the compressor.

  • do-it-myself Jul 20, 2010

    Removed Expansion Valve - Emerson RP31073. Non-Bleed. Valve is completely blocked and no air passes through at room temp. Called Allstyle that makes the expansion coil system in attic. Their tech says valve should pass air when at rest. Do you agree ? Am getting a replacement valve in a couple days. The store had a generic but I insisted on a direct replacement Emerson, it is a bolt in replacement. The generic needs some fittings attached. So we think the valve caused the blockage. Will reinstall. Pull vacuum, release freon stored in the compressor.

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  • Master
  • 455 Answers

Hello RR Hard start can't hurt BUT dosen't sound like the problem.Do you have a scroll compressor?They don't need a kit.Does it start every time?It could be short cycling on LOW PRESSURE SWITCH.If the unit is (pumping down) during the run time you have a restriction in the system.Make sure the service valves are open ,do you have a filter dryer colgging up or a bad TXV valve also could cause short run times.20-30 PSI the switch cuts out.

Posted on Jul 15, 2010

  • do-it-myself Jul 15, 2010

    Scroll compressor = YES. I agree that resctriction is very likely. Compressor shuts off, but before it does pressure climbs too high. We think it is the high pressure circuit shutting it off. You say no hard start kit needed. OK, I will skip that . Going to completely evacuate and capture all freon today, then I can remove filter dryer and replace. How can I test TXV valve ? Is it located next to, or on, expansion coil ? In this case in my attic.

  •  Christopher a Martin

    Hello RR Definately try the freon extange if there are noncondenseables in curcit it will cause problems.The txv test is (weigh in the factory charge )and nothing changes ,same symoptms.Is condenser coil clean?Is there enough air cooling it.High pressure could be overcharged unit & the recovery will slove.Let me know how you make out.The TXV is in the attic.

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