The switch evidentally burned up and it will ave to be replaced. It is not an easy job. I've just within the last two weeks, "repaired" the switch assy. It was extremely tedious and in the end, for me, unnecessary, I did replace the entire switch only, verrrrrrry carefully. I did find some evidence of minor charing of the plug behind the switch but I believe this was caused when the heater fan resistor partially burned out, it lost the bottom two speeds. I only needed to replace the resistor which, on a '97 Tracker, is located behind the glove compartment door and is a very easy job, made easy because the sides of the glove compartment press in and the door drops down and there it is. One screw holds it in and if it breaks, so what you're replacing it anyway, it's made from some type of hard plastic and given it's age, well, it'll probably break.
either a fuse for dash or the light switch
A bad control switch can cause your 2003 Nissan Sentra heater blower to stay on. The motor or a bad sensor can also cause the heather not to work properly.
bulb, switch, fuse, ground.....
Blown fuse, bad heater blower motor control switch, bad blower motor, or a bad blower motor resistor pack.
It is either the fuse or relay. also check the heater/ ac control switch.
Blown fuse, defective heater control switch, bad resistor pack, loose or disconnected wire.
fan speed control switch is bad. Replace it as long as the other speeds work fine.
Here are responses: * Several things could be the cause. Low coolant. Heater valve. The belt. The compressor. Check these in the order shown. * You most likely to need a new temperature control switch in your heater/ac. This is the switch in the dash; easy to change.
Your heater relay switch may be bad
There isn't a reset switch. The light is reset with a scan tool after the cause of the trouble code has been repaired.
Fuse, switch, speed resistor or motor.
Check fuse if the blower is not working. If it is then replace your heater core. if its not then replace your fan switch.
There are several things that can cause your 2003 Geo Tracker four-wheel-drive not to work. The first thing you should check is the ground wire on the switch.
possibly when the a/c is not needed to cool the air temperature you set. The A/C control module has failed, as revealed on a diagnostics check.
Check the A/C fuse, that's what happened on my '85.
Low coolant? Defective thermostat? Heater core "airbound"? Water pump circulating coolant? Selector switch working? Temperature control cable?
yes it will shut down. the low pressure switch will shut it down.
the heater core could be pluged or the heater control valve is stuck closed
Most likely it's the heater control valve. If the heater control valve leaks a little it can allow a small amount of heated engine coolant to circulate through the rear heater core.
1. there is an air bubble in the line. 2. the heater core it self is really dirty inside or it is blocked up. feel the hoses going to the heater core. one should be real hot the other just slitely cooler. if this is true then the core is good. the problem may be in the on/off controls. depending on the vechele, a control switch may be in the heater hose or in the heater core. the input hose is hot, the output hose cool. the switch may be stuck so it is blocking the water getting to the core. have some one watch the switch under the hood while some one is in the vechele working the switch on and off.
A switch becoming hot is not normal. The cause could be loose connections where the wires join the switches terminal points. This could be the cause of the heat being generated. Misalignment of the switch blades inside the switch can also cause the heat to appear. Another cause could be that the heater loads are higher that the amp rating of the switch. Switches have a label on the side of them rating what the current carrying capacity of the switch is and what the maximum amount of current that the switch can legally tolerate.
low coolant? Bad thermostat? Climate control not sensing proper temperature? Heater core plugged or restricted? Heater core airbound?
bad heater core, heater hose blockage, low coolant, bad heater valve, bad control head. With my car, it was Heater matrix clogged with radiator sealant. The workshop cleaned it and it's start working fine!
Blown fuse, bad fan speed control switch, bad blower motor resistor pack, bad blower motor, or loose or disconnected wiring.
Either the linkage from the temp control unit to the valve on the heater core (which is behind the radio and temp controls) or it is the heater core itself.