exhaust fan keeps running luxaire gas furnace - http://www.hvacmechanic.com/ Forums
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Replies:
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| Mastertech
|  "Re(1):exhaust fan keeps running luxaire gas f"
, posted Fri 22 Oct 00:14  
Exhaust fan may be a signal there something wrong. Check all the roll out switches(I think 3 in the burner section and maybe one in the blower section) Just push the button. Also the control board should give u a blinking code. Its near the blower.
Have u check the filter lately.
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| | dmeskis
| "Re(2):exhaust fan keeps running luxaire gas f" , posted Fri 22 Oct 07:15
Ok, i'm a rank novice when it comes to furnaces, cars i know. What do the roll out switches look like? And how do i check them? I can't see any blinking light for a diagnostic code, is there a cover that may be hiding it? The filter is clean, it gets changed religiously every six years i mean months, seriously though it is almost new.
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| | xenos
Webmaster 
| "Re(3):exhaust fan keeps running luxaire gas f" , posted Fri 22 Oct 16:59
It's a temperature sensing switch located near the burners. and to test it just check it for continuity.
Xenos.
The best way to escape a problem is to solve it.
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| | dmeskis
| "Re(4):exhaust fan keeps running luxaire gas f" , posted Fri 22 Oct 21:34
I think i found the sensor, two leads going into a small round thing bolted into the burner rail? If it is that there is continuity present while the exhaust fan is running. Is that correct?
don
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| | xenos
Webmaster
| "Re(5):exhaust fan keeps running luxaire gas f" , posted Fri 22 Oct 22:23
That sounds correct, now you could have up to 3 ( normaly 2)limit devices and that is one .
Xenos.
The best way to escape a problem is to solve it.
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| | dmeskis
| "Re(6):exhaust fan keeps running luxaire gas f" , posted Fri 22 Oct 23:34
what are the other two? One i assume is the main control module? and the other? if there is another. The only other components that I can see, are the main control module, the vacuum switch, and a box with what looks like a capacitor or coil that is mounted to the side of the furnace with the main power wire going into it.
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| | xenos
Webmaster
| "Re(7):exhaust fan keeps running luxaire gas f" , posted Sat 23 Oct 19:09
One is normaly on the panel right in the center of the furnace and the last would be on the blower id the furnace is a downflow.
Xenos.
The best way to escape a problem is to solve it.
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