Old Flamemaster gas furnace's blower fan continuosly runing


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Old 10-27-14, 06:44 PM
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Old Flamemaster gas furnace's blower fan continuosly runing

Hi there,

I am from Alberta. My problem is my 1970's (1972-1974) old Flamemaster gas furnace's blower fan continuously running. I set a higher temperature on thermostat the furnace starts heating with blower fan running. When I adjusted to lower temperature the heating stops but the blower fan still keeps running all the time. The only way to stop it is turn the power switch off. My thermostat is also old and simple one with no fan "auto', "on" positions. I cleaned the filter, but no change. Any suggestions?

Thanks a lot!
Adam
 
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Old 10-27-14, 07:11 PM
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I can just imagine the heat going out of your chimney there.
Not much energy efficiency. I'm guessing gas is inexpensive.
Be sure to get the heat exchanger inspected for rust and rust thru.


Your furnace should have a fan/limit switch like in the picture below. Some have the white knob on them that manually turns the fan on. See if you have one of these there. If you do have one it may need replacement.

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Old 10-27-14, 09:28 PM
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Thanks PJmax.

I have checked furnace and I can not find the fan/limit switch you showed. How can I do now?

Adam
 
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Old 10-27-14, 09:57 PM
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A model number may be helpful here.
A picture of the inside the front of your furnace would help. http://www.doityourself.com/forum/el...rt-images.html

How about a part that looks like in the picture ?

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Old 10-28-14, 06:11 AM
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Pj max what is this part called it looks like the 2 that the light sad was bad but there not
 
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Old 10-28-14, 07:26 PM
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Thanks PJmax.

Three pictures attached. First two are the inside the front of the furnace. Third one is the picture of draft inducer, which I do not know its function. The switch at the left side on the first picture is "pilot" and "on" switch. Hope the fan switch is in the pictures.

Adam
 
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Old 10-28-14, 07:29 PM
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The draft inducer connected to fan prover switch, I will upload the picture right away.
 
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Old 10-28-14, 08:04 PM
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Hi PJmax,

Three pictures attached. They are all on the wall of the furnace. Hope those picture helps.

Adam
 
 

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