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My rodgers 50A55 won't turn off circulator fan until 20

Customer Question
My white rodgers 50A55...

My white rodgers 50A55 won't turn off circulator fan until 20 minutes after gas stops burning. Is that normal?

Contractor's Assistant: I'll do all I can to help. How long have you been dealing with this?

Since I moved into the house last thursday

Contractor's Assistant: Do you plan on doing the work yourself?

Yes. Im a retired eletrical engineer

Contractor's Assistant: Anything else we should know to help you best?

Perhaps there is a unit that alows adjustment of various parameters

Contractor's Assistant: Did you double-check the thermostat? And what about the unit's filters?

Yes and yes

Submitted: 7 months ago.Category: HVAC
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Answered in 9 minutes by:
12/5/2017
HVAC Technician: David Bowden, General Contractor replied 7 months ago
David Bowden
David Bowden, General Contractor
Category: HVAC
Satisfied Customers: 1,208
Experience: Owner at Floridaco
Verified

Hello and welcome to Just Answer… My name is ***** ***** I will be assisting you today as well as providing a quick and straightforward solution to your specific question. Please allow me a few moments for some research and to confirm my recommendations, which will appear shortly.

In the meantime, if you have any more information you would like to add, ask additional questions, would like to make a comment, or would like to upload helpful photos, please use the reply box below. Thank you!

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HVAC Technician: David Bowden, General Contractor replied 7 months ago

Usually the fan relay has a temperature Hi/Low switch that can be manually adjusted. Those type of switches are normally higher on the burner chamber. If the setting is too low, the fan has to keep running until enough cool air tells it to shut off. If you raise the low setting the fan will shut off at a higher temperature.

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HVAC Technician: David Bowden, General Contractor replied 7 months ago

Here is a link to see the type of limit switch. Not sure if yours has this or not, but scroll down to the older photo.

https://dengarden.com/appliances/How-to-Replace-the-Limit-Switch-in-a-Furnace

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