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-   -   blower motor on the furnace keeps running. (http://www.diychatroom.com/f17/blower-motor-furnace-keeps-running-136237/)

esidros 03-06-2012 09:41 PM

blower motor on the furnace keeps running.
 
what causes the blower motor to keep running on the furnace?

esidros 03-06-2012 09:43 PM

Quote:

Originally Posted by esidros (Post 872428)
what causes the blower motor to keep running on the furnace?

What could be the problem?

Plumber101 03-06-2012 09:46 PM

Thermostat fan selector set to the ON position
High limit tripped
Roll out limit triped

When was the last time you replaced the filter?


Brand and model would help

hvactech126 03-06-2012 09:47 PM

fan switch on t-stat set to ON instead of auto. Or a high limit is tripped due to low airflow.

Plumber101 03-06-2012 09:48 PM

Quote:

Originally Posted by hvactech126 (Post 872437)
fan switch on t-stat set to ON instead of auto. Or a high limit is tripped due to low airflow.

Thanks for the back-up. LOL

hvactech126 03-06-2012 09:51 PM

yep, you got me by a few seconds

how 03-06-2012 09:56 PM

Just to extend that list...
Thermostat wire cross connection between "R" & "G" /a sticking fan relay or if you are dealing with a furnace that's 25 years or older.. broken fan- limit control or a summer fan switch left on.


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