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airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 7712
Experience:  Furnace, A/C and heat pump specialist.
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American standard gas furnace model GUB-75 what should the

Customer Question

American standard gas furnace model GUB-75 what should the limit switch be set at
for the fan and heat
Submitted: 10 months ago.
Category: HVAC
Expert:  airheatman replied 10 months ago.

This is going to be an older furnace,probably hard to find a manual Can you tell me the model on the limit switch? Usually we want fan on at about 130, cycle off at 95 and heat to shut down if we get over about 180

Customer: replied 10 months ago.
don't have original part had replaced last year furnace keeps going on and off too much
Customer: replied 10 months ago.
furnace is from the sixties
Customer: replied 10 months ago.
GUB-75 E-4
Customer: replied 10 months ago.
75000input 60000 bonnet 70 to 105degrees
Customer: replied 10 months ago.
Honeywell on switch
Expert:  airheatman replied 10 months ago.

Looking to see what I can find. Can you send a picture of limit?