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Mitsubishi Mr. Slim split-system heat pump not blowing hot air

I have a Mitsubishi Mr. Slim split-system heat pump (model MSH09TW). It came with the house when we bought it, and has never worked properly. When in "cool" mode, it blows room-temperature air. In "heat" mode, it doesn't seem to blow any air at all, even though the fan on the outside unit is running. I tried replacing the capacitor, but am not sure what else to do.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Mr.Slim Mitsubishi dual zone system

We had that problem with two units that we just had installed. Both are hooked up to one compressor. After several calls and the service person coming out twice, it turned out that they had two wires mixed up when they did the installation. Once they switched the wires the units ran ok.
BUT...now we are having another problem with the units/compressor not working after losing power in our house. We lose power on a regular basis here. Does anybody know if that means we will constantly need to call the service people to come to get the compressor working again? Or is there anything we can do to reset it? The service person that came today was not very helpful and didn't have a lot of answers for us.
Thanks

Posted on Jul 23, 2008

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SOURCE: fan coil unit won't cool or heat in room1 while room2 runs well

could be undercharged, or overcharged, or wires weren't put back on valves in unit.

Posted on Feb 16, 2009

  • 1 Answer

SOURCE: Blueway split system wall air conditioning doesn't work properly.

Hi,I have had problems with my Blueway A/C it was very cheap but NASTY,anyway I might be able to help, I made a website with my manual that includes the error codes that I could not find on the net anywhere ,I have also sourced a company in sydney who has spares and have the contact details listed and started a forum that we can help each other out with

Posted on Apr 05, 2009

mcgyver468
  • 710 Answers

SOURCE: Bryant Legacy Line air conditioning not blowing cool air..

Your outdoor condenser is in heat mode. Check the wires on the thermostat. Sounds like a small wiring problem and nothing else. Good luck. Please keep me posted as to you progress.

Posted on Apr 27, 2009

  • 116 Answers

SOURCE: The outside unit on our Ruud heat pump won't turn

first look for red button neer the copper line set if has one push it second inspect thermostat wires for weed eater damage check disconnect for fuses check breaker at main panel pull disconect and remove cover check stat wire connections look at the capacitor if swelled up on top bad if all look ok put disconect in using insulated object manually push in contactor if unit comes on check for 24 volt ac on yellow stat wire to common if none stat wire could be loose at indoor unit or stat bad hope this helps you

Posted on Jun 06, 2009

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