[dwh55]

Hi,
anyone know where i can find a fan limit switch for a lennox G14Q3-60-20??

 

[yuri]

cozyparts.com

Very hard to find as it has a timer built into it. Recommend a new furnace as there are some obsolete parts like the gas and air flapper assemblies. Also the heat exchanger may be cracked. Need a Lennox tech with a pressure test kit to check it.

 

[roughneck]

Is that a pulse? Model looks vaguely familiar.

 

[yuri]

Yep. G14 and G21 were Pulses.

 

[roughneck]

Ahh makes sense then.
Look into a new furnace. Haven't had a pulse around here for a long time. They all failed and were ripped out. Had a over 30 in a school we took care of. They all failed at almost the same time.
Not a high point of design for Lennox.

 

[dwh55]

well thanks guys.....just trying to get through the winter. now if someone could answer my original question, that would be great!!

 

[user_12345a]

If the limit part of the switch is okay but it's not bringing on the fan, you can set the t-stat to bring the fan on with a call for heat as a temporary measure.

I've read about heat exchanger problems with the early pulses but they apparently were otherwise solid. lennox was ahead of it's time; they had two-speed, high-seer a/c units in the 80s as well which must have been hell to work on.

 

[beenthere]

well thanks guys.....just trying to get through the winter. now if someone could answer my original question, that would be great!!

Post #2 has your answer.