Question about Ruud UAMB Air Conditioner

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Fan setting only works

The fan only setting on my thermostat works but when I switch the setting to auto it will not blow air through the vents.

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Bad thermostat or open thermostat wire can cause this condition

Posted on Dec 05, 2008

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Air Conditioners have a fan speed relay built in the unit, faster for cold air and slower for warm heated air. It is very possible that your relay is defective

Posted on Oct 20, 2007


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Posted on Jan 02, 2017

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1 Answer

Have a Wi-Fi touchscreen programmable thermostat. The fan will not come on in the auto setting, it will only works in the on setting

Is there also an on/off switch for the fan on the furnace itself? If so check it make sure its set to on. Also check the on/off contacts of the switch on the t/stat to make sure its working.

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My furnace works on ac and blows on ac but on heat it does not blow but i hear a humming sound coming from the furnace

Most furnace operating on Oil or gas will heat the combustion chamber before starting fan to prevent cold air draft at start-up, can last a minute or two. Eiter the main flame does not come on or the chamber thermostat have fail. Try to modify fan option on room thermostat from auto to on. Cold air coming out: burner problem or no more oil or gas, warm air: burning chamber thermostat problem, leave room thermostat fan option to on until repair.

Jan 02, 2014 | Comfortmaker Heating & Cooling

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Home AC only blows cool air when set to fan. When placed on Auto/fan it doesn't blow and no heat.

At your thermostat ,
Set switch to heat, turn up temp switch.
Fan should be set to auto. Wait up to 5 mins to be surethat somthing is wrong. If your fan comes on without heat. Check gas valve or if heat pump check main a/c breaker. If elect heat or any of above dosn't work.
Call a service company. If your in Pensacola. Look up Absolute Heating and Air Conditioning.

Oct 30, 2012 | Heating & Cooling

1 Answer

My heater blows cold air why? I have a REAB 1010s need manual

Check your thermostat to see what your fan switch is set on. There should be two settings - auto and on. If it is set on auto, the fan only comes on when furnace runs. If the switch is set on on, the fan on your furnace is running all the time. Which means when temperature in the house reach what you have set on your thermostat, the furnace kicks off, but the fan keeps running and blows cool air. Some people run their fan all the time, especially if they have allergies, because that's a good way to clean the air.

Jan 02, 2011 | Heating & Cooling

1 Answer

Whirlpool fridge not blowing cold air but freezer

The fridge gets its cold air from the freezer through a vent(damper) between the freezer and fridge.The fan in the freezer blows air through it. Make sure this fan is running. You may have to hold the door switch in for it to run. There is a flap you adjust with the fridge temp. control. Make sure it's opening and closing when you adjust the fridge temp.
The problem could be the electronic control if you have one or the mechanical linkages.

If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.

check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.

May 28, 2010 | Refrigerators

1 Answer

Will not turn on when set to automatic. when switched to on position no hot air comes out of vent.

If you are talking about the switch on your thermostat, "On" and "Automatic" refer to the fan. In the "Auto" setting, the fan only runs when the furnace is running, in "on" setting, it runs the fan constantly. Your furnace is not firing for some other reason, the on/Auto switch is working properly.

Dec 16, 2009 | Goodman GMS90703BXA Heater

1 Answer

My ducted heating continually blows cold air thru

Well, if need be, turn the breaker off. Turn it on when you need heat. Sounds like the fan relay is sticking or something if that sort. Is the tstat fan selector on auto?

Jun 17, 2017 | Heating & Cooling

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