The heater motor is not working, i have chesked the fuse but thats fine. The lights on the air conditioning switch is lit so i'm assuming there is power to the switch, just no sound of the motor working.
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Could be the blower motor resistor or the blower fan switch or fuses check fuses first then move on try using a jumper wire to the fan motor if it works good if not its done do this from the + on the battery
Can be blower motor easy to test --remove it look for imbalance by spinning to check bearing smoothness / freeplay . Hook up ground then use inline fuse connector with lower than fuse panel ## number of fuse -- find power Eg .car battery -- be sure to ground then connect Fan to visually see it spin .. NOW if you have any type of electronic dash mounted controls for heat / air conditioning - most likely electrical issue is in it . you said blower motor does sometimes function - Test wires that plug in to it for power / find groung then probe by test light when in heat mode = switch to air cond mode if fan functions then problem in controls on dash .. if no test light reaction search wires for short or damage .. As FUNNY as it sounds I have pulled mouse nest out of GM heater fans - They access parked vehicle by drain hole inner fender well it drains water from wiper blade / heater vent area .
First. Check all the fuses-focus on the blower motor fuse. The fuse box is located near the hood release lever.
Make sure the slide levers controlling air direction and heat are at the top position. Make sure that the blower switch is on high.
Carefully pull temp control unit out about 2 inches, by removing 2 screws at bottom of unit. Get a test light, and check for current to the unit and blower motor.Make sure the connections to the switches are good.
Check the resistor connection to the blower motor. It is in the engine compartment on the AC condenser housing- at the firewall.
Check all the connections related to the blower motor and make sure there is current to the unit.
A test light will help determine what is at fault. If it is a switch behind the control unit, replace the whole unit. Your local auto salvage yard could have one.
I'm assuming you checked fuses. You can use a test light or meter to check for power at the fuse, at the input of the switch, and then at the blower motor. Then check the motor ground to be certain it is good. Then you might spin the motor by hand to be certain it is free spinning. If all the above check okay, it is probably a bad motor. You can test that by applying power direct from the battery to the motor.
may be a fuse, switch or blower. I would check all my fuses inside as well as under my hood, if they are all good, then I would check my switch, label all wires before disassembling, if switch checks out good then it will have to be the motor blower itself. Hope this helps Tim
Sounds like the blower is not working for starters. We need to troubleshoot blower issues and once we get that straightened out, see what you have. Start with the fuse box and make sure the blower fuse is good. If you have to look further, check fuses and relays under the hood. If this is all good and the blower is still not working, it is a wiring or switch or blower motor issue. Hope this helps!
Check the following fuses:
10 amp GAUGE under the dash, and the 40 amp HEATER under the hood.
If both fuses are good, I suspect that you may either have a bad fan switch or a bad heater fan motor. The switches are rare to fail, I would suspect the heater motor first. Please try this: Turn the key on; turn the fan switch to high. Look under & behind the glovebox, for the bottom of the heater fan motor. Round thing with 3 screws holding it to the heater box. Using a small hammer, or something that you can tap with, tap on the bottom of the heater fan motor. You just may jar the motor enough to make it run. If it comes back on, you may need to replace it at some point in the near future. Worked for me quite a few times. Try that, repost to me what happens. Hope this helps.
there is a loose ground and or wrong size fuses for the air
if loose ground you will want to have a certified mechanic trace the grounds back to source
i dont think it could be relay but there is a way to check this
find the relay panel in the engine compartment open it
find the relay that says air conditioning
pull it out
now there are numbers on that relay
in that same relay box theres relays about 6 to 8 of them that look similar to the air conditioning relay
this is where the numbers come in if the numbers match switch with other relays
mark the air conditioning relay with black marker or nail polish so you know which relay is which
if its the relay thats bad the new relay from the relay box put in its place will work fine
put the old one back in the slot where you took out the other relay out of and then proceed to dealer to purchase new relay for your vehicle if the relay was the problem