Question about Friedrich M18CF Split System Air Conditioner

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Friedrich 12,000 split unit is not blowing cool air. if I did not vacuum out lines when installing a 15 foot run can that be problem? how to fix?

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The only person who can fix that now is an AC engineer

Posted on Jul 28, 2009

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Unit not cooling inside below 72 degrees lines sweating


how hot is it outside??? 20 degree split is usually the norm ,,,,,outside 95 then inside will be 75,,,,,where is the line sweating ,,, it should sweat near outdoor unit

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I have a friedrich ductless split m# mw24cy3f .. call for cool only fan runs inside, call for heat nothing runs, outdoor temp at the moment is 38 degrees, error code light blinks on indoor unit......


not able to find the error codes for the unit number you gave but, here is a number you can call to get them. sorry not more help.
1-866-793-0323 spacer.gif Mon - Fri 9:00am to 6:00pm EST

Dec 20, 2010 | Friedrich Heating & Cooling

1 Answer

Insufficient cooling with window air conditioner


The air conditioner should be big enough. It is hard to say whether or not the 46-47 degrees is right as you did not give a room temperature. The first thing to do before installing a used unit is to thoroughly clean it. Use your garden house to rinse both the evaporator and condenser coils. Also ensure the filter is clean. If the unit is still not cooling properly it likely needs a shot of refrigerant. Beyond cleaning the unit I would not recommend other do it yourself fixes.

Jun 27, 2010 | Heating & Cooling

1 Answer

Friedrich Wallmaster is not throwing cold air.


I have the same problem - bought mine 4-5 years ago been suffering ever since - spent so much money on Friedrich and still using fans. Piece of ****.

Aug 21, 2009 | Friedrich M18CF Split System Air...

1 Answer

Squealing and sometimes doesn't blow cool


A squealing noise is most likely the bearings going bad in the blower motor. This will slow the motor down. If the blower is not operating at the proper speed this will affect the temperature pressure relationship of the refrigerant. This will cause the unit to put out the wrong temperature. Running the unit to long under these conditions can possibly cause further problems ( including a very high electric bill). I recommend that use do not use this unit untill it is repaired or replaced.
Good luck.....

May 03, 2009 | Friedrich M18CF Split System Air...

3 Answers

Remove and relocate split air conditioner


The simplest way of explaining this is as per the following. On your outdoor compressor unit there should be two pipes, one smaller diameter [high pressure] and a larger diameter pipe [low pressure]. Turn your A/C on inside the house and then shut off the smaller diameter pipe. Run the unit for a around 3 to 4 minutes and then check if the cooling is reducing from the unit inside the house. When you feel room temperature air [not cool] being emitted from the indoor unit shut off the larger diameter pipe and turn off unit. Isolate electrics, disconnect A/C piping and immediately seal the piping with good quality tape to prevent egress of dirt. When re-installing a quick purge of gas is usually only required to clear the lines if they were sealed properly and kept clean. Ideally running a vacuum pump is recommended but if care was taken then it may not be needed, as in many of my installations.

Jan 09, 2009 | Heating & Cooling

1 Answer

Friedrich Mini-Split blowing fuse


Low voltage shorts can be a real pain to find!!! i would try a process of ellimination: first i would try to elliminate the thermostat. then id look for a wire that is vibrating on something in the cabinet.

Oct 11, 2007 | Friedrich M18CE Air Conditioner

3 Answers

Friedrich air conditioning - inside unit ice build up


Hi, Reduced air flow, low on freon or being continuously run during cooler weather such as at night. Some people turn their thermostat on 60 thinking that it will help get it cooler faster. They freeze up at night and don't get a chance to thaw during the day. It needs set no lower than 75 or so. The evaporator may be dirty. Don't know a lot about your particular unit but if the outside unit has the compressor and refrigerant lines running to it, The large refrigerant line should sweat all the way to the compressor if its fully charged. Please rate me if I have helped. Good luck kstfas

Aug 28, 2007 | Friedrich M18CF Split System Air...

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