my next guess would be a bad water pump or an air door in the dash is not opening, it would probably run hot if the water pump is bad and probably wouldn't blow any air out of the vents if the air door isn't opening, it may also be a clogged ac condenser, if it is dirty enough it wont allow enough air through the heater core
first of all, check your temp control cable that goes down under the dash. Make sure it is not come loose. You can also check your dash temp control knob if you have one and make sure its not stripped out on back where it mates with the control cable. The next item to check would be the heater control which blends the hot/cold temperature.
Fuse- Blower Motor- Wiring- Selector switch fail- i8f you still have heat to the heater core, if the heater core is cold, and the mottr is still hot... change the thermostat
Check the Heater blower motor, any vaccuum lines that go into the heater, and fuses under the hood. Sounds like a blower motor though.
probably the blower motor resistor
First you have to see if your blower motor is working or not. If it is and still you have no heat then your heater-core is blocked and needs to be replaced.
I hope you checked the fuse.
The blower may simply have burned out. If the blower is out then the heater probably still works.
Yes. Hot water comes from the water heater. The blower motor propels warm air around the house through the duct-work, but is not connected to the hot water heater in any way.
You may have a vacuum leak
Under the hood, on the firewall, passenger side, close to the blower motor. If the blower motor resistor is burned out, you should still have the high speed function.
replace the blower motor switch
by the blower motor there is a resistor connection, you will find it melted the blower motor is bad. it draws to much power causing the connection to get hot and melt and burn. you will have to change the connector and the blower motor. the blower is still working but its drawing to much power, the motor windings are shorted out inside. disconnect the connector from the resistor and you will see it.
if the blower motor still works, somebody probably bypassed the heater core in the past.
yea, check your vacuum lines, i believe its the red shaded clear line that runs on the passenger side of your truck, . by the heater blower motor, also top off your radiator, is the blower coming on>? email me at email@example.com
You still have a blower resister assembly, wiring, and a blower motor itself, in that system. Any one of those could have a problem. You need to use a test light at the blower motor connector and see if you are getting both power and ground. If you are missing a ground, most likely you have a bad blower resister assembly. If you are mssing power, check fuses and wiring. If you have both power and ground, and the motor isn't working, you need a blower motor. I have also found that sometimes tapping with a screwdriver handle on the motor will make it come on, and if that is the case, then again, you have a bad blower motor.
I have changed resistor a d blower motor still not working, maybe i missed a fuse or could the control switch not work?
The blower motor resistor circuit board has gone bad. Replace the blower motor resistor. I did Still dont work Try the fuses...Had the same problem and it was a blown fuse.
There are two things that can be checked to find out. The first is the relay that runs the blower motor may need replaced and the second is the motor itself needs replaced.
OK, did the blower motor actually just stop, or does it still blow but no heat?
Your heater coil is bad.
The blower motor maybe bad / burn out. That will explain you having power to the blower motor and blower motor not starting up. To make sure used a voltmeter and recheck the wiring hardness connection. Blower Motor Removal & InstallationWith Air Conditioning 1. Disconnect the battery ground. > On trucks built for sale in California, remove the emission module located in front of the blower. 2. Disconnect the blower motor wiring at the blower. 3. Disconnect the cooling tube at the blower. 4. Remove the 4 mounting screws and pull the motor from the housing. To Install 5. Remove the clamp from the blower case and remove the blower cage. Mount the cage on the replacement motor. 6. Install the blower motor and tighten the 4 mounting screws. 7. Connect the cooling tube and wiring hardness. 8. Connect the negative battery cable. Check the blower motor for proper operation. 9. Cement the cooling tube on the nipple at the housing using Liquid Butyl Sealer D9AZ-19554-A, or equivalent.
Yes but first make sure that you have both power and ground going to the blower motor...........
First check fuse, if it is good, check for voltage at the motor itself. if it is not present, check the relay in the negative power line located behind the golve box. This relay is activated by the ignition switch and completes the ground path to the blower.(this blower motor has 2 wires on it because the case does not complete the path to ground for the motor) If you turn on the ignition switch while holdiing on to the relay, you should feel it click. If you still have no voltage on the motor, check the fan switch and the heater/AC control switch. The blower motors in these Jeeps have a habit of going bad and drawing too much current and will melt the plastic in these switches and render them unuseable. They must be replaced. If your switches are melted, replace the blower motor first then the switch or switches or you will be replacing the swithes again in a few weeks. Fan switch is about $20.00 at dealer, blower motor is about $200.00 through aftermarket sources. No price on the Heater/AC control.
make sure the blend doors are working properly. check the heater core for blockage or debris around it. check thermostat, and have the coolant checked to see if it is still good.
The AC and heater are completely different subsystems. The heater relies on heat generated by the engine and circulated by the engine coolant (radiator fluid) while the AC uses a belt driven compressor and separate fluids. Their only normal commonalities are the blower motor (which you said works), the ducting and the control head.
you need a new blower motor resistor with auto temp control