overheating and heater not working
Thread Starter
7th Gear
Joined: May 2006
Posts: 7
Likes: 0
overheating and heater not working
I just bought a 95 c4 and love it. i originally bought it for my daughter in Texas but found i liked it so much i drove it back to cal. when i got it the heater worked and everything seemed to work. then the heater gave out and all i got was cool air. the control center was blinking and i removed the fuses as instructed but no good . i bought another control center but same results. i now watch the heat guage and it goes to about 220 plus but slowly drops to 205 when moving. i changed the thermostat but same result. i take it that the car should run at 180 deg as the therm is 180 how can i tell if its the radiator or what. i have heard of horror stories about DEXCOOL but i don't think it came with the dex cool. i partially drained it when replacing therm and it looked ok. anyway i am not too impressed with the dealer as they have screwed me in the past with another chevy. they tend to replace until the problem goes away which can be expensive and still have problem can anyone Help.
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
Sounds like you have electronic ac. Pull the codes. Press up/down fan buttons until --- appears, then use the fan AUTO button to cycle through the codes. Write them down report back.
Did you bleed the coolant system after replacing the thermostat?
Did you bleed the coolant system after replacing the thermostat?
Le Mans Master
Joined: Oct 2004
Posts: 7,706
Likes: 485
From: Everett WA
C4 of Year Finalist (appearance mods) 2019
Originally Posted by redwing76
95-96 has problems with the "heator control center".
Congrats on the car.
Congrats on the car.
Congrads on your purchase of a 95 (GREAT YEAR !!!)
Yep the car is designed to run at those higher temps. Mine stays about 205. If you are concerned you can leave the AC on. The 2nd fan comes on automatically when the AC is on and will cool the engine temps right down. I know that leaving the AC on when in stop and go traffic goes against everything that you were probably told about the effect of AC on coolent temps but on your (our) car it really works that way.
My 95 is a 50mile per day DD and in the morning it's an hour of stop & go traffic. Leaving the AC on causes no problems at all (in my experience).
Last edited by Mr. Peabody; May 24, 2006 at 07:31 PM.
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Le Mans Master
Joined: Dec 2002
Posts: 6,715
Likes: 2
From: Santa Teresa New Mexico
My Mercedes wouldn't blow hot air a bad water pump ate most of the coolant. Didn't notice it till it got hot and eat the head gasket.
The repair was:
Water pump $700.00
Head gasket $1000.00
Engine wiring harness $900.00.
The 94-95 E 320's are a piggy bank avoid them.
The repair was:
Water pump $700.00
Head gasket $1000.00
Engine wiring harness $900.00.
The 94-95 E 320's are a piggy bank avoid them.
Team Owner
Joined: Jun 2005
Posts: 46,295
Likes: 2,596
From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
Great! Take two aspirin, get plenty of rest, then drive the car and enjoy the heck out of it.
What'd you get your daughter, a Cavalier?
Man, I'd be ticked if I were her: from a Corvette to a Cavalier...then again, if I didn't pay for it...........free IS good!
What'd you get your daughter, a Cavalier?
Man, I'd be ticked if I were her: from a Corvette to a Cavalier...then again, if I didn't pay for it...........free IS good!
Thread Starter
7th Gear
Joined: May 2006
Posts: 7
Likes: 0
actuall i bought the car to leave with my daughter in Texas to drive ( she already has a 2004 SUV (no fun just big)) and i would have a car when i go out there. but like i said it was just too much fun to drive.
thanks for your help i am sure i will get the problem solved.
thanks for your help i am sure i will get the problem solved.
Thread Starter
7th Gear
Joined: May 2006
Posts: 7
Likes: 0
Originally Posted by Jet-Jock
Sounds like you have electronic ac. Pull the codes. Press up/down fan buttons until --- appears, then use the fan AUTO button to cycle through the codes. Write them down report back.
Did you bleed the coolant system after replacing the thermostat?
Did you bleed the coolant system after replacing the thermostat?
I have borrowed a "obd 11" auto scanner but all i get with that is error code
the thing is it works for the air condit the motor comes on water flows thru the heater (although i know it could still be plugged up) but no heat and the light blinks when i put it on auto or any of the settings.
Racer
Joined: Feb 2006
Posts: 388
Likes: 0
From: Moscow pa
I would disconect the battery for a few minutes and see what happens it will clear the codes Also when you hold the two buttons and oo comes up press the auto button and the fault code should come up. Let us no what the code is Tbone
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
Well that's what the flashing LEDs mean you have a DTC set for the HVAC controller.
Try again, ignition On (not running) press the < and > arrow buttons at the same time until --- is displayed, then press the center AUTO button to display codes. They only go up to 09.
Try again, ignition On (not running) press the < and > arrow buttons at the same time until --- is displayed, then press the center AUTO button to display codes. They only go up to 09.
Racer
Joined: Jun 2003
Posts: 292
Likes: 13
From: Houston Tx
If you are worried about the high temp, then change your coolant and and replace your thermstat with a 160 degree. Mine usually maxes out at about 210 degrees in heavy traffic, other than that mine hardly ever reaches 200.
Le Mans Master
Joined: Dec 2002
Posts: 6,715
Likes: 2
From: Santa Teresa New Mexico
Originally Posted by 95Torch
If you are worried about the high temp, then change your coolant and and replace your thermstat with a 160 degree. Mine usually maxes out at about 210 degrees in heavy traffic, other than that mine hardly ever reaches 200.
