Kmore model 110.67841600. Replaced temp control switch because temp would not match setting. Air flow no heat still had heat. What else could be wrong? Does this unit have cycling tsat?

SOURCE: Air Conditioner malfunction

Hi, Sounds like you have a short in the control circuit to me. Turn off all power going to the unit. Write down or otherwise mark the wires leaving the control board going to the thermostat. Remove them from the control board. Replace the fuse. Turn power back on and see if the fan still runs. If it does, check and or replace the heat limit switch that brings the fan on during the heat cycle. It may just need adjusted. If the fuse blows, I would think that the control board is probably bad. If it doesn't blow, Remove the thermostat. Leaving all thermostat wires open check them with an Ohm meter. There should be no continuity between them. Twist all the wires together at one end and ohm them again at the other end. You should have complete continuity on all wires. If the wiring checks out, down power the unit. Double check your wire colors and rewire the control board. With all wires open at the thermostat, turn the power back on. Touch the RED wire to the YELLOW wire. The Condensing unit should come on. Touch the RED wire to the GREEN wire. The fan should come on. Touch the RED wire to the WHITE wire. The heat should come on. Down power the unit. Replace the thermostat. Test unit. If the fuse has lasted ok but blows now it is either wired wrong at the Thermostat or the thermostat is bad. I hope I have helped. NOTE: If you can not understand these instructions. Call a licensed Heating / Air conditioning company. kstfas

SOURCE: will not shut off

Sounds like a stuck relay on the unit itself. Maybe there is a short in the control wire that comes from the thermostat that activates the fan.

The thermostat probably has one hot wire at all times. The thermostat then chooses which wire to send the voltage down based on your selection. One of those wires is probably for the fan only. Make sure that it is in good condition (no bare, pinched or wires)

SOURCE: heat & air conditioning

your ac/heater door controler motor is not working it opens and closes the trap door in the dash it is right behind the dash it cost around 140.00

SOURCE: air flow switch is on, service needed and the

have you checked the tubing around the fan?
does the fan come on,
check for restrictions or blockage in the air tube as well as the discharge or flue,
your heater seems to not be getting enough air for combustion to occur.

Michael Kent

• 343 Answers
• Posted on Oct 02, 2010

SOURCE: Heat/air vents for defrost and feet setting not

I think your problem is mechanical. There is a distribution box behind thedash where flaps divert air to the specific locations although they may be electrically or vacuum actuated it is probably a mechanical linkage to these flaps or something is creating an obstruction. Check all the other connections while you are in there including any duct work to these areas