Edmunds dealer partner, Bayway Leasing, is now offering transparent lease deals via these forums. Click here to see May lease deals!
Options
Popular New Cars
Popular Used Sedans
Popular Used SUVs
Popular Used Pickup Trucks
Popular Used Hatchbacks
Popular Used Minivans
Popular Used Coupes
Popular Used Wagons
Comments
ignition is off/ 2003 avalanche
WHERE DO I START, THANKS
I also have a 98 Jimmy with the exact same problem. It has been like this for 3 winters and no one has been able to explain, or fix, the problem. Can you please copy me if you find out how to correct this. Thanks.
Ac works and heater works but will only come out through defrost vents.
Could it be the control unit? or What?
Please help.
Goodyguy~
I'm having the same problem with my heat, if you get any suggestions that work let me know please. thank you.
The fix: typically when this happens it is simply a vacuum line that has disconnected; the problem with these vacuum lines is that they are very easy to remove from the connector nozzles, they're just like the tubing you use for fish tank air pumps.
Another reason could be that the vacuum lines are cracked, you should be able to tell by feeling the rubber, if it is not supple and feels hard or brittle it might be time to replace the lines. Should be easy enough, just buy a few yards of vacuum line tubing and replace each line one by one, cutting each to the proper length and reconnect.
And a little tip if you're replacing your temp. sending unit, use a wrench to tighten new one, I used a socket to get old one out and i broke the wire connector off.
the 'reset' procedure, removed the BAT RDO fuze waited 10 secs, replaced it, put
the key in on position and waited >1 mins for the ECC to reset, BUT it didn't fix it. When we push the 'a/c' button on the climate control panel, the light goes on and the compressor under the hood kicks in, AND the lines to/from the compressor at COLD, but the air blowing in the car is HOT.
Originally I took to a 'shop' and they suggested replaced the Climate control panel (I have been trying to located a used one, b/c the new GM ones are $300) but I can't find one, plus reading the posts some people have done this with NO success.
Since the compressor feels COLD, I think there is freon...and the blower buttons
seem to be acting correctly (actually the reset 'might' have allowed the blower to
respond..not sure at this point if that changed or its just our imagination, hoping the 'reset' did something!)
Should our next step be check the 'doors' in the area beside/behind the glove box?
to see if they are stuck?
I read about a potimenter (sp?) is that the same thing as the actuator doors?
This is my daughter's car, limited money, so we don't want to spend a forture on
mechanic bills..
ANY SUGGESTIONS ARE APPRECIATED!!!!
http://wiki.answers.com/Q/Why_would_your_98_GMC_Jimmy_blow_hot_air_even_when_the- _temperature_gauge_is_set_to_cold
Hope this helps. Have not checked my Jimmy yet but I have the same problem. Will check it out tomorrow but this sounds like the real fix.
On a 2000 GMC Jimmy I have recently discovered that my "no heat blowing" issue is due to the fact that my a/c compressor is running as soon as I turn on ANY of the temp controls. Once I removed the fuse for the A/C compressor, the temperature controls will blow hot/cold as per the control setting, with/without using climate control. Any idea why my a/c is continuing cool/run when the settings are for heat and the A/C is not even turned on via the switch?
Thanks in advance.
On mine it is located behind glove box, just drop glove box down and let it hang. Behind it you will find the vent selector control, its round and has a single wire leading to it, take the wire off and pop the control up and move it to the side. Just behind that and up a little is the heater actuator. Two nuts in front and left side that you can take off with a ratchet. It is a tight space, but if you just get screws to turn a little you can do the rest with your finger and ratchet piece. Then pop off bad actuator and turn the knob that actuator sat on to the center position so it matches your new parts position. Put the actuator on, put the nuts back on and connect wires, put selector control back and your done.
I had this problem for a few years and struggled every season beacuse heat/ac wouldn't switch back and forth. This fixed the problem.
Ian
changed cap as it was leaking. Flushed block
and heater core with garden hose, both had full
flow. I'm stumped. Any advise out there on what
next to check. This vehicle also has temp. control.
Thanks for the help.
Another reason could be that the vacuum lines are cracked, you should be able to tell by feeling the rubber, if it is not supple and feels hard or brittle it might be time to replace the lines. Should be easy enough, just buy a few yards of vacuum line tubing and replace each line one by one, cutting each to the proper length and reconnect
Does anyone else agree with this assessment of the problem?
i have a late model 95 Jimmy 4x4
Thank you for taking the time to post your concerns. I apologize for your frustrations. I would recommend speaking with the dealer. They are in the best position to diagnosis your vehicle. Please let me know how things go at the dealer.
Christina
GM Customer Service
Just left it at the shop. Mechanic says i need to have the gaskets replaced for $500. Does this sound right? Is the price right? Just dropped $500 on catalytic converter replacement. wondering if repair is worth it or should i cut my losses.