Question about Heating & Cooling
The furnace blows hot air but does not shut off. I have replaced the thermostat after having the problem none of the wires are touching each other. What could be the problem?
Look at the "klixon" style heat actuated switches mounted on the fire box of the heater. One of them is not working.
Posted on Jan 05, 2014
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Posted on Jan 02, 2017
Having changed the fuse and breaker tell me there is a major short in you furnace. 240 volts is a lot of amperage and a very delicate job to attempt to help you directly. I have found that any intertherm dealer near you will be happy to help solve your problem. Yes, the sequencers are possible reason but 50 amps at 240 volts is what concerns me. Did your transformer burn out also?
Let me know what you think and if you would like, I will locate the correct source of help. Thanks, JT
Posted on Feb 03, 2009
Best things to do is find your Return grill in the home.
Get a measuring tape and measure the Hole size with the grill removed, Or filterback grill whatever the case.
Then simply go to a home retailer with the size, or in rare cases you may want to consider a Hogs hair washable filter that can be cut to size, to fit it perfectly.
Posted on Oct 24, 2009
SOURCE: My furnace will not turn
I would suspect your evaporative motor (located in the furnace) is shorted.
To prove it - just disconnect the electrical wires to the motor and turn the breaker back on.
Most likely the breaker will stay on - which will tell you for sure that the motor is shorted.
Note: it's possible that the capacitor on your motor is shorted - but I doubt it. i would bet on the motor. In any event - you have a 'direct short' which is causing your breaker to pop, and I would bet it's the motor.
If it isn't the motor you will just need to find the 'short' to keep the breaker from popping.
Posted on Aug 06, 2011
High limit safety device is probably tripped, it should reset automatically, also check other safety's for tripped condition, they look like small round device located in a variety locations through out the unit with two wires to each one, some have small push button resets located in the burner compartment area. If all the safety's are reset and check out OK the main control board may need replaced. One of the most common causes of high limit safety device trip is lack of air flow, Dirty filters, evaporator coils, malfunctioning blowers, closed supply air registers etc.
Note: High limit safety switches also go bad after being tripped to many times.
Posted on Dec 01, 2011
If it's only a two wire system, it should be on the R/RC and W. Fan should kick on automatically.
Not too familar with that unit
A is usally for a heat pump pick-up coil or heating element
Pay attention once you've rewired the t'stat. Make sure the blower goes on automatically. The most it should take is apx five min, even if house is really cold
Also, check the heater. It may have way more options for control. You will just have to run new t'stat wire to take advantage
Posted on Mar 06, 2013
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