Ask Experts Questions for FREE Help !
Ask
    Cole Nelson's Avatar
    Cole Nelson Posts: 6, Reputation: 1
    New Member
    		  
    #1

    Dec 21, 2009, 11:02 PM
    Central heat and air
    I don't think I worded my last question the right way so I will try again.I have a Intertherm central air & heat unit model # ASCO36BCRAA it is an old unit the product date code is 83JY-21-01 My problem is with the blower fan in heat mode the fan only comes on when I put it to the on position it will not come on when set to auto the heating elements and thermostat work fine.When I put it in cool mode the fan comes on and goes off fine in auto.So my question is why doesn't the fan come on and turn off in auto in heat mode?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 22, 2009, 12:11 AM
    Because the automatic blower fan control that does the job in the heat mode is defective. Depending upon your equipment it could be a

    Temperature controlled fan relay

    Fan and limit control

    On electric furnaces it could be one of the heat sequencers

    OR just a small fan heat blower control disc.

    The part will have to be replaced before it will work properly.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Central Air and Heat [ 4 Answers ]

I have a 10 seer air and heat unit in my home. The compressor was hit by lighting. My electrician put in a 13 seer unit and also replaced the inside unit with 13 seer. Now my insurance company want pay for the inside unit. My electrician said that you can hook up a 13 seer compressor to a 10...

Central heat and air [ 1 Answers ]

Brand new unit, got home and the temp was 110 and still running although Ihad the thermostat set at 72. What's up?

Should I choose central air/heat or ductless air/heat systems [ 7 Answers ]

Hello. I am rehabbing a house which is approx 3100 sq ft including basement. It currently has radiators and no central air. I've been reading about the ductless heating and air systems and the idea of them seem great but are they really better than the forced heat and central air systems? Is the...

My central heat and air won't blow out heat [ 1 Answers ]

Recently, my central air ran out of freon so this summer I couldn't cool my house.Now my Unit will not blow out any heat. I tried to turn the heater on but it smelled like it was trying To catch on fire. All I want to know is do I need to apply freon to get my unit to produce Heat?

Central Heat and Air not blowing air at all [ 1 Answers ]

Hello, I am a girl trying to save myself a little money and maybe embarrassment before I call someone out to look at my a/c problem. You know, trying to avoid the fact that I all I had to do was plug it in... ha/ha. I just moved into an apartment, everything was fine until all of a sudden I...

View more questions Search