Replaced the blower motor, resistor, all fuses and the relay still no heat blowing. All connections are good, checked the wires. What else is there to try?
Re: Replaced the blower motor, resistor, all fuses and...
If air is blowing,just not hot, you either have a plugged heater core or the control valve is stuck (manual heater) / blend door not working (climate controlled).
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
check for a good ground for the blower motor as if you have 12 volts at the motor it indicates a problem motor or no ground wire to complete the circuit
on most vehicles when the heat stops blowing it's usualy not a fuse or a relay but the blower motor or the blower motor resistor.
Here is a good way to check if it's the blower motor. Disconect the plug going in to the blower motor, Now run two long wires from the battery one on the negitive and one to the possitive. put power to the blower motor with theese wires, negitive to one post and possitive to the other .Does'nt matter what post you hook to the blower motor will just spin the opisite way. if the blower motor spins then you can rule out the blower motor and suspect the blower motor resistor is bad. to find the blower motor resistor all you have to do is follow the wirring from the blower motor. The resistor will be at the end of the wirring for the blower. The resistor will be mounted on the heater box near the blower motor and is usually held in by two screws.
The heat or air do not blow, this would mean the blower motor is not working, the first step would be to check the blower resistor as this is a common problem on these.The best way to test this would be with a test light.Take the test light and turn heat on then check blower connector for power, note unplug connector and test, make note of which wire has power, then connect the plug back. using a piece of wire connect one end to a good ground and stick the other end into connector on the blower that had no power and see if blower runs. If the blower runs then you have a bad blower motor resistor, this is located next to the blower on heater box, if you follow the wires from the blower it will lead you to resistor, unplug resistor and check for burnt connector. if connector is damaged then you will need to replace the connector also, then remove screws holding the resistor in heater box and remove it. Back to testing if you do not have power on one wire at the blower then check all the fuses, Next if you have power and the ground does not turn blower on then try tapping on the blower motor to see if it turns on, in either case if there is power and a good ground to blower then blower will need replacing. Hope this is helpful good day.
SOUND LIKE BAD BLOWER MOTOR RESISTOR.CHECK BLOWER MOTOR HI BLOW FUSE AND RELAY.YOU WILL NEED OWNERS MANUAL IN GLOVE COMPARTMENT TO LOCATED BLOWER MOTOR FUSES AND RELAYS.
Check the blower motor speed control resistor pack is ok.
(The resistor pack is usually located in the blower fan ducting in the air flow).
Check condition of electrical connection terminals on the blower motor circuit - these terminals pass considerable current and over time may fatigue overheat and loosen.
Check operation/replace any blower motor control relay,
Check the blower motor will run if +12v directly applied to the blower motor.
Check operation of the blower motor speed control switch is ok.
chk the fan speed resistors mounted in the fan housing. You should be able to see the wires going into the box with 2 screws holding the resistors in place. Good Luck.
×