Question about Mitsubishi MS12TN Air Conditioner

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Heater!!! Unit acts like its heating but there is no hot air. Fan turns on, heat symbol is showing on the remote, but no heat

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  • Anonymous Nov 11, 2007

    igniter turns on so dose fan but no flam

  • latif Nov 13, 2007

    Ihave MR slim Mitsibushi ceiliing mounted but there is no heat coming from the unit and sometimes sign like p8 and E0 flashes in the LCD.please help. abi

  • Anonymous Nov 17, 2007

    IT COOLS BUT WILL NOT HEAT

  • usmcs2007 Nov 21, 2007

    hi my name is fernando I work for a hotel in engineering department, my question or my problem is that the heat work sometimes but the next day is not blowing hot air only warm air what is the problem and we use this units with thermostast

  • Anonymous Dec 20, 2007

    on call for heat the fan won't start on auto the heat does not go pass the zone valve

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I am experiencing a similar problem with my Mitsubishi slimline MSH09TW unit; about 4 years old; It use to give us very hot air now it is giving some what hot air; northeastern USA current temperature about 15F. You think frigid weather in Cranbury NJ could be responsible or some thing else is going on. Please help me if you have some time and knowledge about Mitsubishi heat pumps. Sincerely, DSS

Posted on Feb 07, 2007

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Thinking of purchasing, I browsed the mitsubishi slim web-site, and noticed they tout the A/C features. TV advertisements lead us to believe the units operate as regular ductwork heat exchangers that include a heating unit built into the exchanger. That does not seem to be the case as they suggest hooking the unit to your existing gas or electric heating unit, and also hook you up to purchase heating units.

Posted on Jul 16, 2008

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I have the same problem with my Amana PTH153B50AE . It runs with cool air come out but no heat. Can someone suggest anything wrong and what part I need to replace? It is very cold now in my room. Thank you very much.

Posted on Feb 19, 2007

Chances arre it is the high limit sensor L240F

Posted on Feb 15, 2007

I have the same problem. In heat mode air comes out at room temp, not heated. Unit is set to 72 degrees and room temp is 65. I have also tried setting the unit to 90 and still get not heat.

Posted on Jan 28, 2007

Room temperature

Posted on Jan 23, 2007

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Compressor is running just cold air now

Posted on Jan 13, 2007

  • loren heinz Jan 13, 2007

    very cold

  • loren heinz Jan 13, 2007

    warmed room up from 66 to 68 degrees then became cold

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Heats for about 10 minutes then becomes cold

Posted on Jan 13, 2007

  • loren heinz Jan 13, 2007

    electric heater heats for about 10 minutes then becomes cold

  • loren heinz Jan 13, 2007

    its cold

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Check your fuses in outdoor disconnect or circuit breaker sounds like compressor is not coming on may be bad run capacitor

Posted on Dec 31, 2006

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Is the air coming out just room temp or is it "cold" air vice hot air?

Posted on Nov 10, 2006

  • Marc Wilson
    Marc Wilson Dec 31, 2006

    Sure, give a poor rating when more info is needed.... jezz people, we need more descriptions sometimes to offer suggestions on where to look. I guess their username should be a clue not to offer help huh?

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1 Answer

I have a neo plasma lg 7kw will not heat LG Air conditioner


Make sure the setting on the remote is correct . Sun symbol for heating. Make sure the filters are clean. On heating, the indoor unit will 1/2 open the flap but the fan shouldn't start. The outdoor unit should start and if working properly, will be blowing cold air. The indoor unit will open the flap fully and the indoor fan will start once it gets hot then you should feel warm air. If the outdoor unit is blowing warmish air, I would say the reversing valve coil has failed or one of the indoor temp or pipe sensors are faulty. If a sensor fails, a "CH" error should appear on the display.

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DONT KNOW WHAT SIMBLES ON REMOTE CONTROL ARE EG HOT COLD ETC


Symbols:
1. fan leaves - Fan only
2. Rain drop- Dry mode
3. Snow flake-Cool mode
4. Sun- Heat
5. A or AU- Auto mode.

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I have a centrex air con.. and i dont know what to do the air is not cool.. and there no button in the remote that i could use and fix it..


In your remote, there is mode button, the symbols for each option will display. The symbols are:
"
Now symbols:
1. fan leaves - Fan only
2. Rain drop- Dry mode
3. Snow flake-Cool mode
4. Sun- Heat
5. A or AU- Auto mode.To get proper cold air set temp 23 degree and mode"cool". To get heat set temp minimum 3 degree more than room temp and mode in "Heat"

Feb 02, 2011 | Heating & Cooling

1 Answer

We have bought a house with on old air conditioner and no handbook. What are the symbols on the remote for heat and cool please? ie. How can I tell which is which?


Fan mode- 3 leaves of fan.
* synbol for cool
Symbol of sun refers Heat
< or > temp increase or decrease
on/off button refers for switch on or off.

Hope it's helpful msg?

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1 Answer

Are all symbols on a/c the same


Ok the snowflake means that the unit is cooling. The sun means that the unit is heating, the raindrop means that the unit is dehumidifying, the fan means that the unit is using the fan only as ventilation without cooling or heating and the funny triangle looking thing is auto mode where the unit sets the mode automatically. The little bar in the middle displays fan speed and the two little arrow things next to it means that the fan is in auto mode where it sets the speed automatically. There I hope that that helps.

I take the time to answer your question, so please rate me.
Thankyou Mat

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I believe the problem in lies in the dual stage heat mode setup on the thermostat, but the unit going into defrost does make the unit act kinda strange. Even more so than other types of equipment. I would suggest hiring a licensed HVAC service technician if the problem cannot be resolved by yourself.

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