Ask Experts Questions for FREE Help !
Ask
    mfob40's Avatar
    mfob40 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Dec 11, 2010, 08:53 AM
    Honeywell programmable thermostat fan won't go on when set on Auto
    I have a honeywell 7 day programmable thermostat (20 yrs old) - the autofan mode stopped working. The heat works only when switched to 'on'. When it is sleep mode/on I have it set to 63, but it goes up to 72. We just replaced the blower motor because it burnt out. Do I need a new thermostat?
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
    Ultra Member
    		  
    #2

    Dec 12, 2010, 04:01 PM
    If the furnace is as old as your thermostat you may have a bad fan/limit control switch. They are made to bring on the blower after the heat exchanger is heated up. Over time they go weak and will not bring on the blower.
Not your question? Ask your question View similar questions
 

Add your answer here.


Check out some similar questions!

How do you bypass a honeywell basic programmable thermostat to run a/c until bad thermostat is replaced [ 2 Answers ]

Just a quick question.

Honeywell Programmable Thermostat [ 2 Answers ]

I just changed the batteries on my Honeywell Chronotherm IV Plus, programmable thermostat and the temperature shown for the room is extremely high (104 degrees now) when the room is about 67 degrees. How do I fix?

Thermostat not turning on fan when set to AUTO [ 7 Answers ]

My problem is a little bit different then those I read about. My thermostat just started not to turn my fan on when the heat starts up, causing it to shut off. The only way my heat works now, if I manual turn the fan setting from AUTO to ON. Which causes my fan to run all day. Please help! It was...

Honeywell programmable thermostat [ 1 Answers ]

My thermostat's display is showing - AC and the heat will not come on, I removed it and replaced the batteries to no avail? What can I do to get the heat to work again? It is 40 degree's here

Programmable Thermostat, Fan runs, Heat/Air do not run in Auto setting [ 10 Answers ]

I am installing a Honeywell, RTH230B. My connections are: R to Rh (red jumper to Rc that came with the unit) W to W Y to Y G to G B to nothing The fan comes on (when set to "on").

View more questions Search