Question about Mitsubishi MS12TN Air Conditioner

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Rheem heating unit

Fan blows cool air only. ignitor dose not light what could it be

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Pls check your settings. if not you have a defective heater.

Posted on Jan 24, 2008

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Posted on Jan 02, 2017

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Rheem forced air heater code 13 flame lost can i fix it or do i nrrd a repair man?


This is a easy fix .just locate your flame sensor and clean it out with sand paper. Flame sensor will be opposite side from the ignitor in the burner section with just 1 wire going to it.
Just unscrew it and clean

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1 Answer

Heat Pump Blowing Cold


Unless you just installed or had the thermostat installed recently, I would not point at the thermostat as the problem. With what you have described I would suggest have your units serviced as it sounds like a loss of charge, or failed defrost control board. The "Aux" comes on when the unit is using secondary heating (electric heat strips). That occurs when the demand temperature (what you set it to) in Heat mode is more than the current room temperature, usually ~2-4 degrees higher. Also happens in defrost mode. Defrost is a heat pump cycle that melts any build up of ice on the condenser unit (outside unit). That process is simply the unit running in cool mode which will heat up the outside unit to melt any ice. Defrost cycles vary with manufacture but usually you can tell if is in defrost by looking at the outside unit, during defrost the unit will be warm or hot sometimes there is steam and the compressor will be running but not the fan. Defrost only happens on heat pumps in "Heat" mode. Rheem has a 10 yr compressor and parts warranty, so call the installer or Rheem authorized service company.

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1 Answer

Indoor fan blowing cold air when on heating


The indoor fan will continue to run. When heat pump goes into defrost the outdoor fan stops, the reversing valve switches and the unit is basically working in the cooling mode. In order for you not to feel a blast of cold air in the winter the electric strip heat also comes on so the indoor fan must run while the strip heaters are on.

Jun 03, 2010 | Heating & Cooling

1 Answer

My Home Ac Unit Is Not Blowing Any Air


This sounds like the fan not turning during cool. You will have to check the fan relay for power during the cool cycle. The fan relay is run by the low voltage side, but still there is hi voltage present. When in heat the power goes thru the relay on one set of points then in cool goes thru the opposite side. You should have a digram present, and then on the main circuit board there is a code light. Check the light for blinking or (flash) read the bottom of the board for the code ( very small print)

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1 Answer

Rheem gas furnace blower unit not working properly


look at circuit board and follow wires that come from fan motor, if this is a standard motor black is high and it will be going to a prong that says cool, red is low and it will go to heat, you will have a yellow and a blue that are "parked" remove red park it were the blue is and put blue on heat, if this is a variable speed motor you will have to set dip switches via your equipment manual

Sep 29, 2009 | Heating & Cooling

1 Answer

No heat from unit. Hear ignitors start but no airflow in house


well i need to know if the fan comes on at all if not then it could be a bad motor or board which is not uncommon but if the fan does come on and then flames go out and fan stays running could be high limit check to make sure in the bower compartment there are no wires disconnected from the blower sometimes when changing the filter it is possible to knock the wire off the board

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3 Answers

Replace Contactor Relay on Rheem Air Condenser


I have a Rheem heat pump/airconditioner, Mod # RPFA-036JAS, that I have had problems with for at least 5 years and have paid over $1,000 in parts and service calls. I can vever recreate the problem when a tech is here. It usually happens in the middle of the night. I hear a Click, ckick, click sound, through the unit and it sounds like it is comming out of my air handler, but the outside unit also clicks at the contactor and the condensor cooling fan moter will start and stop about every half secongd or second. Both contactors have been replaced, the small one twice, one capaciter
has been replaced. I allow the unit too cool down and its alright for a few hours. That is difficult when the outside temp is below zero. HELP PLEASE!

Feb 16, 2009 | Heating & Cooling

1 Answer

Lg heat runs all the time


It sounds like you have the fan turned on. If you go to the stat, you should see an auto button, or switch for the fan. If you just switch it to auto, the fan will stop, and only start when the unit calls for it, hope that helps

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