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Conair mini split heat pump isn't cooling but has cold suction line but warm liquid line and is not freezing up the evaporator. Thinking a sucking reversing valve?? What could cause that? Both evapor

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Make sure that your refrigerant charge is good first. Reversing valve has 4 pipes coming off of it. The one alone is discharge and centre of 3 is suction always. The two sides are the reversing pipes. One side should be same temp as discharge and other same temp (+-5F) as suction. If not then you have bypassing refrigerant in valve. Bad.

Posted on Jul 16, 2013

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Posted on Jan 02, 2017

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SOURCE: AC not cooling enough

Probably low on refrigerant, if valve moves when heated it is working, assuming the system is matched.

Matt

Posted on Jul 01, 2008

  • 2 Answers

SOURCE: a/c shuts down after about 30 seconds

Sounds to me either a low refrigerant charge or low air volume over the evap coil (inside). There is a sencer for temps outside maybe it's tripping out on that.

Posted on Nov 10, 2008

sodeep
  • 3267 Answers

SOURCE: LG DUCTABLE SPLIT TYPE A/C PROBLEM

what you have left out is the thermostat and they relays(electrical) which are activated by the thermostat. Another point is the door closing button near the bottom right side mounted on the body of the fridge. Check it out too.................................sodeep

Posted on Jul 26, 2009

  • 233 Answers

SOURCE: 13 degree Delta T

I assume r-22 refrigerant by the pressure... you have a saturate temperature of approximately 41 degree and 71 degrees at the service port this equates to a 30 degree superheat. a condenser saturation temperature of 105 degrees and since the liquid line temp at the service valve is not given only the enterin indoor coil on the liquid line a 96 degree temperature this would equate to a subcooling temperatureof about nine degrees. You have too high of a superheat reading. verify that the bulb for the txv is correctly positioned and insulated. if it is then you need to remove the bulb from the suction line, hold it in your hand to warm it up and see if the superheat changes. you could also have issues with your ductwork. If the supply temperture is around 50-55 degrees then the unit is doing all it can.. Check the txv and the ductwork as the subcooling indicates that the condenser side is doing it's job, but the superheat readings indicate that you are starving the evaporator..

Posted on Jul 28, 2009

  • 18 Answers

SOURCE: high suction press (98psi), normal head press

lower fan speed.....and double check head pressure, sounds very low!!! should be around 250-275.....also make sure the return air grill is large enough.

Posted on Aug 10, 2010

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1 Answer

What is error E5 on pioneer mini split air conditioner?


E5 indicates excessive temp. of the outside coil if on cooling, OR excessive temp of the inside coil in.

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Goodman unit runs and at the a-coil there is a piston where your suction and liquid lines connect. On the liquid side the piston is cold but warm on the other side of piston. A/C unit will not cool.


That piston is the metering device. On the liquid line, before the metering device it is always warm (this is sub cooled, high pressure liquid), but should flash to low pressure, lower temperature vapor once it passes through the metering device. The suction and liquid line never connect together.The liquid line brings liquid from the condenser to the evaporator. The suction line brings super heated vapor from the evaporator to the compressor. Since the unit does run, I'd have to put a gauge on it,but if I had to guess, I'd guess you have high head pressure. Check for dirt or debris on the condenser, check for proper clearance of the condensing unit and check for operation and directional rotation of the condenser fan. This could also be the result of an over charge.

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Hi Frans! I'm Roger. I have never had to disconnect the Evaporator from the Condenser to clean them but here is your answer. Use the access valves on the liquid side of the condenser. After evacuating, let the vacuum pull liquid R22 into the liquid line access valve to about 80 gauge pounds and close your refrigerant port on the manifold. Start the unit and add GAS to the suction port to bring your pressure up. If you have a scroll type compressor you can add liquid to the suction port but add gas just to be safe. Exactly how much you add depends on the efficiency of the compressor and how cold you want the discharge air to be. Normally we shoot for 34 to 40 degree evaporator with 18 to 25 degree temperature drop across the coil. R22 at 34 degrees is 60.2 PSI (Pounds per square inch) on your compound gauge. That's normally blue and on the left side of the manifold. The gauge that's hooked to the suction line. 40 degrees is 68.6 PSI. The amount it will take depends on the size of the condenser and length of your line set. Watch the amp draw on the compressor while charging. The name tag will have an RLA or FLA number that is the normal operating amperage of the unit. Add gas on till the suction line is cold at the compressor, then wait 5 or 10 minutes for the system to stabilize. Adjust you pressure again and you should be done. Let me know if you need anything else and if so, be as specific as possible. Roger

Apr 20, 2011 | Heating & Cooling

1 Answer

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Cooling not cold


Hi, This is called a split system heat-pump. If it was cooling and stopped and cooled again and now stopped, you need to be sure the outdoor unit is working properly. You can only check certain things as they require special gauges and know how. Make sure the condenser fan is on and reach down where the 2 copper lines are when it is on. Grab hold of the large line which is the suction side and it should be cold enough to condensate. The smaller is the liquid line and should be warm in the cooling mode.If not, listen to see if you can hear the compressor running inside of it. Should hear a humming sound. You can carefully remove the control panel door and feel it to see, but BE CAREFUL! Don't get your hand in the fan blade. Do these checks and get back to me when you do and we can go from there.
Sincerely,
Shastalaker7

Jan 05, 2010 | Heating & Cooling

1 Answer

A/c shuts down after about 30 seconds


Sounds to me either a low refrigerant charge or low air volume over the evap coil (inside). There is a sencer for temps outside maybe it's tripping out on that.

Nov 10, 2008 | Mitsubishi MS17TN Air Conditioner

3 Answers

Ruud heat pump


If the top of the compressor is freezing you either have low refrigerant or a restriction in the coil. Check the air filter and change if necessary. Turn the outside unit off using the outside disconnect found a few feet away from the condenser. Let the indoor unit blow air for a few hours to melt the ice off of the coil. Turn back on the outside unit and after about a half hour, you should feel the cool air from your ducts. If the cool air gets warmer over the next hour, you will need a tech to look for leaks and recharge your unit. If it continues to blow warm air even after the 3-hour wait, you have other issues. To answer your original question, on the indoor unit you will find access panels that can be removed for inspection and cleaning. They are commonly located where a 3/4" drain pipe exits the cabinet. While the unit is off, remove these panels and inspect for a buildup of debris. Good Luck!

Sep 11, 2007 | Heating & Cooling

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