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Question

the fan doesn't always come on to circulate the heat. A couple of times it triped off my smoke alarm.

Submitted: 351 days and 3 hours ago.
Category: HVAC
Value: $9
Status: CLOSED
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Posted by HVAC22 350 days and 23 hours ago.

Info Request

Hello. I'd like to help you with your problem. How long has this been happening? Do you see or smell smoke? What type of furnace is this?

Posted by Ronald D. Walden, E.I. 350 days and 21 hours ago.

Answer

Most furnaces have a "fan switch" that waits for the temperature to come up before turning on the fan. This is to keep the furnace from blowing cold air. This sounds like a defective fan switch that is intermittently sticking in the open position keeping the heat going without the fan to pull air through and cool it thus the smoke alarm.The switch/sensor should be attached to the outgoing pipe and may even say "fan" on it. Try tapping on it the next time it gets stuck and see if the fan starts. If this solves it, replace the fan switch.

Edited by Electro10 on 12/7/2008 at 1:18 AM

Posted by Ronald D. Walden, E.I. 350 days and 21 hours ago.

Answer

If this solves the problem, please click on the green Accept button and leave feedback.

Edited by Electro10 on 12/7/2008 at 2:05 AM

350 days and 5 hours ago.

Reply

I can follow the electic lines from the fan to a black switch then down again to a silver box at the bottom of the furnace that goes directly to the electric switch. I take it your talking about the black switch directly under the fan. I'm not at home right now but I'll check it early this afternoon and get back to you.

I don't know how this works with getting the pay to you, but when I get back to the house, I'll definately hit accept. Thanks for you help and I'm sorry for seeming to be so cheap but with this economy and lossing my job over a year ago, I hope you can understand how cautious I'm trying to be.

Bud

Posted by HVAC22 350 days and 3 hours ago.

Info Request

I will opt Out and allow Electro continue with assistance.

Accepted Answer

XXXXXXXX,
I was going back through my list of answers and payments and see this is still open. I hope my advice and direction were correct as the most important thing for us is to take care of the customer. In order for me to get paid, you have to click on the "Accept" button. Also it is important for you to leave feedback for the quality of service we give to the customer. If you require any further information, please contact me. Thank you for your patronage, Ron Walden, E.I.

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Expert: Ronald D. Walden, E.I.
Pos. Feedback: 100.0 %
Accepts: 
Answered: 12/12/2008

HVAC Mechanic

2nd Generation Technician, Civil Engineer, SAFETY FIRST! Electricty, Gas & Carbon monoxide can kill.

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