My heater worked a little bit today when I had the thermostat changed but notice the fan wasn't working and that's why it did not heat the cabin. Now I notice the air compressor is coming on while the heat is on. How do you fix that. The auto repair guy says that is not suppose to come on.
OP is the dash blower dead and silent on all speeds, High too.
is the blower fuse good.?> test it.
that be first.
my guess is you want heat to work
#2 is , is the water temp at 180F and holding, if not there will be no heat, engine hit is first. tests. (blower fixed)
tell more get more
defrost sure does, use A/C, to turn it off.
use non recirc.
use full hot temp
use full blower speed
use non defrost
are both core hoses hot, at fire wall
is the damper working
end hit list
Testimonial: "The guy at auto zone change my blower resistor and now the heat works fine. Thank you"
he did for you, that is AMAZING ! free labor, wow, what a gift, your blower fails on not high but lower speeds , most blowers use direct connections on high, no resistor used, that is the big clue on most cars. made. before pulse width modulators.
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Well the ac compressor will come on if you have it in defrost mode,if heater is blowing cold ,after you just had thermostat replace ,you could possibly have air in system.now if your heater motor is not working which is called the blower motor under dash it could be the resistor that controls it also these rigs have been known for wire harness problems at heater control unit and the blower motor connector.good luck,mike
Testimonial: "The guy at auto zone change my blower resistor and now the heat works fine. Thank you"
THE DASH BLOWER IS DEAD? (In all modes,) x2, defrost runs a/c to dehumidify air, but of defrost is off, the A.C compressor must be off, so your mech, may have noticed that and is correct, if he turned it off, which im 100% sure he did,if ASE tech, if the blower is dead, in dash that be first, no sounds, no air in all modes, there are up to 4 fans on car, 2 on rad, 1 on evap and 1 in dash called a blower, so fan on or off means little, until you say where it is.? ill presume BLOWER IS Silent, on HIGH, if that the case the blower fuse is blown, if not controls failing,if not, blower is bad, see? see that path of logic, for one part, battey to blower? always fix the easy stuff first, nice decode on OP symptoms.
sure would like to kjnow if blower failed on high, some with upgraded climante controls might do that. love to know.
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SOURCE: Heater not heating my Jeep
the problem is the air temperture control door (known as a blend door) is stuck or the door's actuator is not working. your engine temp is correct and not the problem.
SOURCE: Heat/AC Blower fan speed only works on High
Alot of people have the same problem with the fan switch and blown bulbs. There really is no fix for this. Jeep really screwed up when designing the heater control assembly. The cheapest solution is to buy another unit off Ebay. Can always go to the dealer but be ready to PAY for there mistakes.
SOURCE: The heat in my 1992 Jeep Wangler is not working.
Hi!
It
appears we have an Air lock scenario and you will need to perform a
system Bleed.
Park
the vehicle on level ground, when cold remove coolant filler cap,
start engine and leave to idle, turn heater on full and blower to
max. When engine reaches operating temperature watch and listen near
coolant filler, keep clear as gurgling and hopefully a boil over
should occur. Top up with very warm coolant and wait as it may do it
again.
Check
for heat inside vehicle if warm replace coolant cap but keep an eye
on temperature gauge as the ~Air lock may have moved on from heater
matrix/core so proceedure needs to be carried out again from COLD.
If
persistent boil ups/over attention must made in the cylinder head
or
gasket area, or possibly water pump?
Please
press the Blue button to appraise my FREE Efforts, Thank You!
Paul
'W' U.K.
SOURCE: Heat/AC Blower fan speed only works on High
hello, this sounds like a bad blower motor resistor!! its cheap and easy to change..if you need more info on locations let me know,, good luck.....marty
SOURCE: My heater does not work
sounds like you have some mechanical aptitude..... I LIKE THAT!!!! Now....get your hand up to the evap box....after the jeep has been running for a while so it can get warmed upand turn the heater on......you should feel some hot air on the evap box on the mid to upper part...if you do this is good...it means you have a temp door actuator stickin....which is a huge tsb for these vehicles....if there is no hot air on the evap box on the inside of the jeep then get back undr the hood and put your hands on the heater core inlet and outlet hose......should both feel the same hotness...if not then ya have a faulted heater core...try to flush it and replace if necessary..........HOPE I HELPED!!!!
Testimonial: "Very helpful! Thanks for your help!"
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