Question about Friedrich QuietMaster Electronic SS12J30D Air Conditioner

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A/c fan not working=thermostat is working(central a/c system)a/c

A/c fan not working-thermostat is working(central a/c system.)

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  • Sam Gibson
    Sam Gibson Jan 06, 2017

    I'm sorry to hear that your A/C fan is not working while your thermostat is working. I would imagine that not having your air conditioning unit working in the middle of summer could be difficult. Have you had any HVAC professionals come and look at it? It seems like anyone who may have issues with their A/C unit would need to have someone come out sooner than later. http://www.adelaideheatandcoolgawler.com...

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The fan on the outside unit is powered from it's 240 volt source. Check that the breaker for the outside unit is not tripped. Also, a contactor is inside the outer unit that starts the fan - it may be faulty.

Posted on Jul 26, 2008

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What fan? Inside or out? Check in the fan on position. If no then likely bad relay .

Posted on Jan 07, 2017

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3 Answers

How do you turn on only the fan to cirrulate air through the house in the summer?


Hello Wendy,

You didn't say what kind of system you have, so we'll assume you have central heating and air conditioning.

There are a few things you can do to keep air moving in the house with your central system. Depending on the brand of system you have, you can turn the heat/cool switch on the thermostat to "off" and turn the fan auto/on switch to "on." This will disable cooling and heating but allow the fan to run continuously.

You can turn the thermostat up to a temperature far above what you would normally use in summer and turn the auto/off fan switch to on. This will force the fan to run continuously. The cooling will still work when the temperature in the building exceeds the higher set point.

These steps will work on most systems but if you have one of the new "NEST" or other internet-connected temperature control systems, you can refer to the operating instructions to see what your options might be.

Note that leaving the fan on all the time will result in higher electrical costs, more wear and tear and you may have to clean or change the furnace filter more often.

You might be better served by purchasing a free-standing floor type "tower" fan and placing it in the room you are in most frequently.

You could also use (or install) ceiling fans.

Jul 19, 2017 | Heating & Cooling

1 Answer

Have a Janitrol central air system and the unit outside comes on but the fan in attic does not always come on. If I go to the thermostat and manually turn it from auto to on it comes on. Any ideas about...


If the blower is working with the thermostat in the ON position that tells you that the fan motor works. In the AUTO setting... the system in controlled by the contacts in the thermostat. 1. The thermostat contacts might not be closing. 2. A contactor( or relay ) in the air handler unit(inside unit) might not be closing to send the signal to the fan motor. It sounds like a thermostat or relay problem to me. You can email me at Starztruck4u@aol.com if you have more questions.

Aug 05, 2010 | Heating & Cooling

1 Answer

Hello We have a Trane central air


Bad thermostat, improper wiring or bad circuit board in furnace. Turn off the disconnect outside.

Dec 30, 2009 | Heating & Cooling

1 Answer

St6400c thermostat wont run the central heating independantly


This does not sound like a thermostat problem. I would be looking for a zone valve or circulator pump problem.

Nov 05, 2009 | Honeywell Programmable Thermostat Heater

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Fan blower at dashboard not working and rear a/c not working. sometimes ticking sound at rear a/c. what need to be replaced or repaired. thanks


first check power if ok check the thermostat is on also the settings fan on and mode cool if all ok ,check low voltage is cooect at thermostat terminal if ok check fan relay may be no voltage to the coil or the coil is defective or the contact point are damaged

Sep 13, 2009 | Ruud Central System Air Conditioner

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My central air fan isn't blowing. The thermostat


Check the master circuit breaker at the power panel? Should be 2 50 amp vreakers. Turn them off rgen back on.

Jun 08, 2009 | Ruud UBHC Air Conditioner

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Central air


Most thermostats have a setting for the fan called, "manual". That keeps the fan on continuously. The electronic thermostats can fail in a "fan on" condition. That would require a new thermostat. I also saw one air conditioner with a fan relay welded "on" by electrical surge. That would require a new relay.

Jul 20, 2008 | LG LWHD1800R Wall/Window Air Conditioner

1 Answer

Fan Won't Start


Check your circuit breakers.

Jul 06, 2008 | Ruud Central System Air Conditioner

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