Question about Heating & Cooling
Central air was running fine last night. Checked temp this morning, thermostat lcd screen was off. Honeywell T8001C t-stat, took off and switched f to e, let sit. Did not fix when I put back on, this model has no battery. Used multimeter to check and had no voltage on any wires. Checked breaker, not triped. Checked fuse in furnace, good. Checked condensation line, free of clogs. Checked condensor which just has the pull out style disconnect and was installed. Not sure what else to check, it appears that the furnace isn't getting power maybe? Have pictures if that helps.
If you do not have 24 at the stat you have to check inside machine. Either blew a 5 amp fuse or a bad transformer. Check both primary and secondary sides of transformer. If 24 volts at transformer you must follow that 24 volts (likely red wire) and find where it stops. Good Luck!!
Posted on Apr 23, 2017
You have a bad transformer. It may be the capacitor, but i,m thinking the transformer.
Posted on Apr 23, 2017
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Posted on Jan 02, 2017
SOURCE: I have a Carrier 38tra048340
Blank screen sounds like a fried thermosat. Abrupt outages can affect certain types of thermostats. Make a jumper wire and jump across R and G. See if you get any action from anywhere. If a fan or compressor kicks in you know you have a burned out thermosat...
Posted on Jun 23, 2008
It is normal. Your house has to go down a couple more degrees because the heat pump is not working. You can solve this by rewirng you thermostat. Take off the wire that goes to Y and tape off. Then take the wires that are marked w and e or w1 and put the wires to yellow. Do not run ac with it wired like this. If you need more information please post me back
Posted on Nov 29, 2008
if your power vent moter is not running you should not have have glowing ignitor.Frist the vent moter must close an air prove switch in series with the idnitor .seems you have a stuck air prove switch.Its the one with a hose attached
Posted on Apr 07, 2009
Is the blower wheel turning? Did you by chance have to remove the motor from the blower wheel to work on it? If you did, did you put the blower wheel back on in the correct direction of air flow? Also, did you put the correct capacitor back on the unit so it can get up to the required rpm's? These are things that you will need to check for. If the motor is running and the blower wheel isn't and the wheel is tight on the shaft, then you will have to replace the motor. The brushes may be bad on the unit and it's not turning the shaft. Hope these ideas help.
Posted on Apr 10, 2009
If you look at control box at roof unit, they usually use a separate set of wires for furnace. See what colors they are attached to at harness to thermostat. Some just follow other harness, and come out at thermostat. (bypass control box) Once you've determined which 2 they are, join them together & see if furnace starts, as it should. If it does, thermostat is faulty. If not, pull outside cover off & check voltages at furnace. I'm guessing by furnace model that your unit is approx 30 ft , but if it's a park model, you may have 24 volt system on furnace or 12 volt. Another way of confirming is to go to back of furnace where air intake grille is inside your unit, and locate 2 blue wires going to furnace & remove whatever wires are attached to them & connect them together. Furnace should start up.
Posted on Jul 08, 2009
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