Ask Experts Questions for FREE Help !
Ask
    lindaw55's Avatar
    lindaw55 Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Nov 6, 2011, 09:54 AM
    Furnace keeps running thermostat off?
    Yesterday my furnace blower would not shut off even after I turned the system switch to "off" and turned the temperature down all the way (50). It was so hot in the house I had to turn on a fan and open the windows to sleep. I finally flipped the breaker switches for the furnace and it stopped running but I don't know what to do long-term. Please help!
    twinkiedooter's Avatar
    twinkiedooter Posts: 12,172, Reputation: 1054
    Uber Member
    		  
    #2

    Nov 6, 2011, 02:57 PM
    Your contactor switch is stuck as it went kaput. You need to get a new switch installed. It won't magically fix itself and start working properly either if you were wondering.
    lindaw55's Avatar
    lindaw55 Posts: 3, Reputation: 1
    New Member
    		  
    #3

    Nov 6, 2011, 04:20 PM
    What is that? And how much might it cost to replace? And how do I go about replacing it?
    drtom4444's Avatar
    drtom4444 Posts: 3,282, Reputation: 145
    Ultra Member
    		  
    #4

    Nov 7, 2011, 01:04 PM
    Is your unit electric or gas? If electric you have a stuck relay that needs replacing. The relay or contactor is only about $15.00 or so. If it has a light duty relay as most have I would replace it with a higher amperage contactor that is much more reliable. It's a very easy repair. You should get a two-pole contactor with the proper amperage, probably 30-50 amps, and a 24 volt coil. Takes about 20 minutes to fix. DrTom4444
    lindaw55's Avatar
    lindaw55 Posts: 3, Reputation: 1
    New Member
    		  
    #5

    Nov 7, 2011, 05:57 PM
    It is electric. I am having someone come out to look at it on Friday so I will mention that possibility, although they will be able to figure it out anyway.
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!

Colman electric furnace the heat keep running thermostat is switched off [ 2 Answers ]

Seems to happen once a week for some reason on thursdays. After I switch the breaker off I can hear something in the furnace click before I can get the cover off. Probably something resetting . Is this a bad sequencer. The part number I have is 15sh22 and the furnace model is EB20B. Any help will...

Furnace running randomly... no apparent relationship to thermostat settings. [ 0 Answers ]

Last night, my Rheem gas furnace was not kicking in when the temp dropped below the thermostat setting. It did run at times throughout the night & was putting out warm air, but now it is only putting out cold air. We have checked the breaker & changed the batteries in the thermostat. Any...

Furnace not running on AUTO thermostat setting [ 1 Answers ]

We recently had our electric service upgraded to a 200 amp service. We now have a problem with the furnace turning on. It will run when set on the "ON" setting on the thermostat. It will not come on when set on "AUTO" What could be wrong with this? Thanks! Sandy

Running a wood furnace blower through a thermostat inside the house? [ 3 Answers ]

For US wood furnace/Model: 1557M

Gas furnace pilot trouble. Goes out while furnace is running! [ 1 Answers ]

About a month ago I put in a new thermocoupler in my furnce and it's been working fine. This morning I woke up to no heat. I can re-light the pilot with no problems. The piot light keeps on burning if I don't turn the thermostat up to turn on the furnace. Then when I set the thermostat to 70...

View more questions Search