Question about Heating & Cooling
If you have a newer style programmable thermostat there are batteries in the thermostat that need replacing. Otherwise look at the thermostat wiring. If you have a voltmeter. check for 24 volts ac on the terminal with the red wire and the one marked C. If no voltage is there either a fuse is bad or the 24 volt control transformer is bad.
Posted on Jan 05, 2014
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
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
Tips for a great answer:
Mar 10, 2015 | Vulcan Heating & Cooling
Nov 15, 2014 | Heating & Cooling
Jun 23, 2014 | Heating & Cooling
Feb 05, 2011 | Heating & Cooling
Nov 16, 2010 | Honeywell Heating & Cooling
Dec 11, 2009 | Honeywell Programmable Thermostat Heater
Nov 22, 2009 | Kohler K-T462-X4V-CP Memoirs Rite-Temp...
Nov 17, 2009 | Vulcan AUW230A Heater
227 people viewed this question
Usually answered in minutes!