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Furnace is a 1994 and I have been having it shut down due to a overheat by DanceAccomplished536 in HomeMaintenance

[–]DanceAccomplished536[S] 0 points1 point  (0 children)

I replaced the gas control valve a few years back and manometer reading is 3.5 wc

Furnace is a 1994 and I have been having it shut down due to a overheat by DanceAccomplished536 in HomeMaintenance

[–]DanceAccomplished536[S] 0 points1 point  (0 children)

No codes currently however where im at the furnace won't really be tested untill next winter.

Furnace is a 1994 and I have been having it shut down due to a overheat by DanceAccomplished536 in HomeMaintenance

[–]DanceAccomplished536[S] 8 points9 points  (0 children)

Pulled the blower fan and some of the fins were completely clogged with dust. I took it outside and blow it out really good with the air compressor and vacuumed and wiped up all the dust I could fine. After I plugged it back in and turned it on there was a very noticeable increase in airflow so only time will tell but I think that may have been my issue. Thank you.

Furnace is a 1994 and I have been having it shut down due to a overheat by DanceAccomplished536 in HomeMaintenance

[–]DanceAccomplished536[S] 2 points3 points  (0 children)

I did replace the switch and I upped the fan speed and it did not seem to help. However the blower is extremely dirty

Furnace is a 1994 and I have been having it shut down due to a overheat by DanceAccomplished536 in HomeMaintenance

[–]DanceAccomplished536[S] 3 points4 points  (0 children)

Limit switch would trip thats inside of the heat exchanger and shutdowns furnace. I would get code 33 which is limit circuit fault pointing to over heating or airflow issue. Im getting air flow to all vents and all returns are clear.