how to replace a/c blower motor

The blower motor is either under the dash on the passanger side of the vehicle or under the hood (firewall) on the passanger side. 1.If the vehicle is equipped with air conditioning, recover the refrigerant from the refrigerant system. 2.Disconnect and isolate the battery negative cable. 3.If the vehicle is equipped with air conditioning, the accumulator must be relocated in order to service the blower motor. This is done by loosening the accumulator retaining band screw and disconnecting the accumulator inlet tube from the evaporator outlet tube. The accumulator can then be moved far enough to access and remove the blower motor. 4.Unplug the blower motor wire harness connector. 5.Remove the three screws that secure the blower motor and wheel assembly to the heater-A/C housing. 6.Rotate and tilt the blower motor unit as needed for clearance to remove the blower motor and wheel from the heater-A/C housing.

Fig. The blower motor installation on the Cherokee To install: 1.Align and install the blower motor and wheel assembly into the heater and A/C housing. 2.Install and tighten the three screws that secure the blower motor and wheel assembly to the heater-A/C housing. Tighten the mounting screws to 20 in. lbs. (2.2 Nm) 3.Plug in the blower motor wire harness connector. 4.If the vehicle is equipped with air conditioning, connect the accumulator inlet tube to the evaporator outlet tube and tighten the accumulator retaining band screw. 5.Connect the battery negative cable. 6.If the vehicle is equipped with air conditioning, evacuate the refrigerant system. 7.If the vehicle is equipped with air conditioning, charge the refrigerant system. 1.Disconnect and isolate the negative battery cable. 2.Remove the instrument panel silencer from the passenger side of the instrument panel. 3.Remove the glove box from the instrument panel. 4.Disconnect the blower motor wire harness connector from the blower motor power module or resistor , depending on how equipped. 5.Remove the three screws that secure the blower motor to the HVAC housing . 6.Remove the blower motor from the HVAC housing.

Fig. View of the blower motor (housing removed) on the Grand Cherokee To install: 1.Position the blower motor into the HVAC housing. 2.Install the three screws that secure the blower motor to the HVAC housing. Tighten the screws to 20 inch lbs. (2.2 Nm). 3.Connect the wire harness connector to the blower motor power module or resistor, depending on how equipped. 4.Install the glove box into the instrument panel. 5.Install the instrument panel silencer onto the passenger side of the instrument panel. 6.Reconnect the negative battery cable.

fan blower stoped working, also can anyone tell me where to get a copy of the Fuse Panel?

This could be due to many different things. First thing to check is the fuse and loose connections. If OK, test blower motor relay.

Hi, I suddenly did not have AC this summer. I took this to the mechanic, and he showed me that AC pump is not starting without a manual kick to it. Replaced it. Now the blow is coming to the car, but only for the first 15-20 minutes. Then the AC has no gas. Just air coming out. After 5-6 hours if you start the Jeep again, AC starts to come with full gas for the next 15-20 minutes. I took this to the same mechanic, and then he showed me the fan (I believe they call it the AC Fan) is not working. The big fan next to the Radiator works. But not the one inside. So he suggests to replace the Radiator A/C Fan.

Can you tell me if I am on the right path? Should I replace the Fan? or the Fan is not working because of a fuse? How would I troubleshoot this clearly.

Thanks

Without know the reading for the a/c its hard to say. It could be overcharged or undercharged or you could have a defective compressor or one of the switches. So if you could get the high and low side readings and get back to me with those I could be better help.

Can it be the case of a failure of the AC fan as it is not working?

If the a/c clutch is not engaging then that would need to be figured out first. If a relay isn't working or a fuse is blown then the a/c cooling fan won't come on as it will see no reason to. If you have a digital multi meter then what I would like you to do is unplug the wire to the ac clutch and then start the car turn the a/c on max and see there is voltage to one of the two wires let me know what you find and we will go from there. Also if the a/c clutch gap is to large the a/c won't come on either, it is an electro magnet that engages the clutch.

The AC/heater fan works on postion 4. The highest setting. On the first 3 settings nothing. Anyone have this problem. I guess the switch cannot be replaced. To replace the fan switch that you select your fan speed with, you must replace the whole unit that costs like $180. I was hoping it could be fixed by replacing the blower resistor for $65.

Try the blower motor resistor its job is to control the speed of the blower motor thru resistances

Just replaced the blower motor resistor. Problem solved. Thanks.

You're very welcome and come again and invite friend/relatives

I can hear my air turning on and the heat when turned on but the blower will not run. I have replaced the blower resister and took out the blower and tested it and it runs. What could cause the blower not to get power?

Check for power arriving at the motor with the key on at the black and violet wire. If no power is found check fuse #6 40amp in the engine compartment fuse box and fuse #25 15amp in the under dash fuse box.

If both fuses are good, check the blower relay.

My blower motor quit working. There was no sound such as would indicate bad motor. I can't seem to find a fuse location in the owners manual for it. Is there one, and if so where would it be located

Welcome to the forum. Start by checking fuse 6 and 25. Also check for voltage on the fuse circuit. Fuse 6 is in the power distribution center under the hood.

Here is a guide and the fuse panel locations and identifications.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers

I have a 1998 jeep grand cherokee, my blower motor on my ac quit working and i believe it is not getting power. i used a volt meter thing on the main power connection to motor and it says no power, checked the engine compartment fuse box and the fuse is good- i jammed the pointers of the meter into the fuse connection box and it didnt do anything.. question: what can i do to get AC??!!

Check fuse #7 underhood box also maybe blower relay or fan switch

Fan switch? do you mean the oneon the dashboard?

yes

Just checked compressor working fine, lines cold. how do i check the switch on the dash. i have it hanging out of dash now.

hi there, 1995 jeep cherokee sport 4.0lt.. 6cyl... hvac problem the short of the story is that the blower motor is not functioning, not even on high... i know that if it was functioning on high, then it could be a bm resistor issue, but that doesn't appear to be the case. given that i went ahead and replaced the blower motor, as that's what most likely seemed to be the issue. what i didn't, but should have done was test for power at the connector, because i installed the new motor and it will not work either... i replaced the ac relay in the pdc, no luck... i've looked at the fuse schematic in the owners manual, and that's the only fuse/relay that seems to be connected to the system... so at this point i'm not sure what i should be looking for... i can't really figure out where the blower motor is supposed to draw power from, and subsequently why it's not getting said power... any ideas?

Have checked fuse #7 blower motor is hot all the time switch provides ground

To get you started, look at the ignition switch. They can develop burned contacts, especially if you use the heater fan on the highest speeds a lot. Also look for two blackened terminals in the connector and signs of melting on the plastic connector body.

If everything looks good at the connector, use a test light to find the two or three 12 volt feed wires, then turn the switch to "run" and look for the additional wires that get 12 volts. I don't have a service manual for that year, but you'll be looking for a pretty fat wire that doesn't get 12 volts or the test light just lights up dimly. If you find one like that you can use a stretched out cotter pin to jump 12 volts to it to see if the fan runs. If that works, suspect the switch.

I checked all fuses under hood. #7 gets no power, but fuse still good.

Checking in power distribution chenter? using a meter? do not check across fuse ground to body then test. Fues is direct feed from battery

Gotcha. I have everything hanging out, and am getting frustrated. lol It is only 106 in my garage. im giving up for the day. Thank you for your assistance. I will probably be back tomorrow.

O.K. heat and frustration don't mix

My jeep has 135,000, 6 cyl. engin. The heater blower motor stopped working in all positions. I changed resistor, checked all fuses problem still exists.
Any suggestions would be greatly appreciated.

Most likley the blower motor. can you test for power or where it drops off? Switch is a possiblity, but long shot.

What happened?

Thanks for the reply, I did test the blower motor directly to battery and it came on. Any ideas?

Hey, sorry had a bad week. Got my finger caqught in my shop vac motor fan.. needless to say im stiched up. lol
Okay, i checked those fuses, and they get power, i took my switches off my dash and messed up the "zone" switch so i ordered a new one which i got today. Once i figure out how to install new switch- what if blower motor still doesnt get power? You mentioned resistor... where is that? my manual doesnt exactly give me a location.
Thnx 4 help!

Yer welcome. Did you check the blower motor relay or fuse?

Relay is located in wiring harness connector that is secured to heater housing, behind glove box.

fuse 25 in the junction block.

check yer email.