[jeffmattero76]

At one of my rental properties when the t stat calls for heat, the furnace fires up and after 30 seconds or so, the blower comes on as it should. However, once the room gets to temperature, the blower does not shut off. I have let it go for hours, and it never shuts off. I have also turned the t stat down to 50 and t he blower stays on. The only way to turn the blower off is to turn off the kill switch on the side of the furnace. I have a meter, but I dont know what to check to diagnose this problem. Any ideas?

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[beenthere]

Made this its own thread.

 

[roughneck]

Furnace model and serial? Does this have a fan/limit control?

 

[jeffmattero76]

Made this its own thread.

I know this sounds stupid but i can't figure out how to start a new thread. Can someone guide me?

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[jeffmattero76]

Furnace model and serial? Does this have a fan/limit control?

I will get that for you later today when i go to the property. Thanks for responding.

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[Tizzer]

Tstat set on Auto - not Fan?

 

[user_12345a]

open the furnace, disconnect the wire connected to g terminal. restore power.

likely a sticking relay and u would have to change the board to fix that.