Question about Heating & Cooling
Have a Hunter thermostat 44155C and when i went to put it in heat mode the heat will not kick in. Have pins on thermostat set for standard, and Heat Gas (hg). When I put the fan into On instead of Auto the fan does kick in but still no heat.
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Posted on Jan 02, 2017
The blower motor kicks on when there has been a 24 volt control failure.
This usually means that a limit switch has tripped.
Most likely that would be a high temp limit switch or a rollout switch.
First, make sure the filters are clean. and the evap coil is clean. If eaither are dirty/clogged, it will partially block airflow, causing the furnace to overheat, causing the high temp limit to trip.
A rollout switch typically trips for three reasons.
1 flame rollout into the burner compartment due to poor airflow.
2 overheating af teh metal plate the rollout is mounted to, due to dirty, old, rusted components.
3 a bad limit switch.
If your unit has an LED light, count the flashes and it will hepl popint out the problem.
(locate the wiring diagram/flash code list, and correspond the flash count, with the code.)
First, check filters.
Posted on Jan 14, 2009
The fans are set to delay for 60-90 seconds to remove all heat from the heat exchanger/heater elements.
If the fan runs any longer than 3-4 minutes after the Emergency Heat shuts off, you may have a bad sequencing relay in the air handler.
Posted on Jan 27, 2009
Make sure you do not have a jumper between the red and the white. Also make sure the wire is not hanging out from behind the screws. If the heat stayes on no matter what you do. The red wire has to be touching the white somewhere.
The red is your 24v supply to the thermostat
The white is what sends the 24v to the heat side of unit.
Just a thought. If the thermostat has a O/B pin or switch on the back. Make sure it's on O. It should only be ob B if it's a Trane, American Standard or Payne.
Posted on Oct 16, 2009
Is this a heat pump? Look in the thermostat. You should have something like the following.
Red wire to R terminal
Green wire to G terminal
Yellow wire to Y terminal
White wire to W or W1
Blue or Orange wire to the O or B terminal
Brown wire to C terminal.
Let me know what you have in the thermostat. The wire colors are not always the same.
Posted on May 23, 2010
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