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-   -   Gas Furnace Blower/Fan Occasionally Keeps Running (http://www.houserepairtalk.com/f8/gas-furnace-blower-fan-occasionally-keeps-running-8520/)

Dr_Zoidberg57 01-30-2010 06:58 PM

3 Attachment(s)

I've included with the schematic a picture of both the upper and lower sections of the furnace. I checked the part number on the black device withe the two red wires attached to it, located behind the gas control unit and it comes back listed as a Carrier Limit Switch (HH12ZA189 replaced by HH12ZB190). Trying not to appear too dense but is this the part that needs replacing?

Just for information, after I removed the covers to take the pictures, when I put the upper one back, the fan started up and kept running. I had to remove the cover again.

I very much appreciate your patience and assistance.

Gerry


Dr_Zoidberg57 01-30-2010 06:58 PM

3 Attachment(s)

I've included with the schematic a picture of both the upper and lower sections of the furnace. I checked the part number on the black device withe the two red wires attached to it, located behind the gas control unit and it comes back listed as a Carrier Limit Switch (HH12ZA189 replaced by HH12ZB190). Trying not to appear too dense but is this the part that needs replacing?

Just for information, after I removed the covers to take the pictures, when I put the upper one back, the fan started up and kept running. I had to remove the cover again.

I very much appreciate your patience and assistance.

Gerry


Dr_Zoidberg57 01-30-2010 06:58 PM

3 Attachment(s)

I've included with the schematic a picture of both the upper and lower sections of the furnace. I checked the part number on the black device withe the two red wires attached to it, located behind the gas control unit and it comes back listed as a Carrier Limit Switch (HH12ZA189 replaced by HH12ZB190). Trying not to appear too dense but is this the part that needs replacing?

Just for information, after I removed the covers to take the pictures, when I put the upper one back, the fan started up and kept running. I had to remove the cover again.

I very much appreciate your patience and assistance.

Gerry


Dr_Zoidberg57 01-30-2010 10:12 PM

1 Attachment(s)

I managed to remove the actual unit's schematic from the cover panal and scanned it. Hopefully this will help as it appears the earlier one was for a different but similar model.



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