Question about 1991 Oldsmobile Cutlass Supreme

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I can't turn on or turn off my heat .

Ok I have a 91 oldsmobile that has digital everything and a heating pannel that does have button's to adjust or turn off or whatever I would need to do I can't turn my heat off at all , it stays on all the time . Sometime's if i'm lucky when it's really cold out like in the negative's I can adjust the temp but then it shut's off and then restarts and it's back to being really hot . I have no defroster so when i get in my car I have to try and crack my window's so it's help to unthaw them and after a half an hour waiting i can finally drive . Could it be maybe a wire is not connected correctly or my pannel is shot ?

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  • Expert
  • 24 Answers

Condenser Blocked From Putting Water In It
Put All Anti Freeze In it To The Top
Take The Cap Off While Its Running For 10 Minutes Is It Circulating,But Is Not Circulating From The Condenser?
Take The Hose Off Under The Dash,It Connects To The Condensor
Is It Dirty?

Posted on Apr 13, 2017

  • 4 more comments 
  • Anonymous Apr 13, 2017

    For Robert Mcmillan: What condenser are you talking about? There is no component in the heating system called a condenser. The air conditioning condenser is in front of the radiator. So how does a hose under the dash connect to the condenser? And why would you put antifreeze in the condenser (even if that were possible)?

  • Robert Mcmillan
    Robert Mcmillan Apr 13, 2017

    Your Condenser Is Blocked Do A Complete Flush

  • Robert Mcmillan
    Robert Mcmillan Apr 13, 2017

    The Sensor Is Readying Open Means Theres A Block

  • Robert Mcmillan
    Robert Mcmillan Apr 13, 2017

    Even If You Change The Sensor The CPU Will Still Tell You Its Blocked

  • Robert Mcmillan
    Robert Mcmillan Apr 13, 2017

    The Heater Sensor Is Under The Dash

  • Robert Mcmillan
    Robert Mcmillan Apr 13, 2017

    Its A Black Box Made By The Swiss An Inch By Inch 3 Swithch

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

emissionwiz
  • 75235 Answers

SOURCE: Car was overheating now the temp gage does not move off C

Try flushuing the system and replacing the thermostat first, then if the problem persists have a shop do a test for a leaky head gasket, but do the easy cheap stuff 1st, only makes sense to me, how about you?

Posted on Oct 07, 2008

SOURCE: no heat 1995 cutlass ciera

Ok quick fix........
This is a common GM problem. The heater will stop operating when the plastic vacume line is broken under the hood. It is an 1/8 inch black plastic vacume line running fron the intake manifold to a vacume check valve under the hood to the heater/AC assy located to the passenger side. You may also want to check the fuses under the dash to the blower motor. If the fuse is good take a Digital multi meter and check for voltage at the motor. If there is no voltage check the reistat in the blower hosing. It is a small rectangle plastic piece on the blower housing with two small screws. Check for voltage at the input and output side. If there is voltage check for resistance at the motor by unpluging the blower motor and probing the terminals to the motor. Tap the motor and see what type of fluctuation you get. Lastly if all that checks out and you have no voltage to the motor or reistat check the switch input and all three fan speed outputs. It could be a simple switch issue.
Good luck and let me know if you need further guidence.

Philip

Posted on Jan 26, 2009

  • 4 Answers

SOURCE: RUNS GOOD STALLS AT DIFFERENT TIMES; ae. STALLS HOT OR COLD

when you removed the water pump, did you disturb the timing in anyway ???

Posted on Jun 21, 2009

  • 1779 Answers

SOURCE: my temperature gauge read red... the light came on

Have you checked the coolant level? If it is low, what you describe will happen, the engine will run hot, and the heat won't seem to work (coolant level too low to circulate through the heater core). Hope it's that simple, if not, let me know and I'll attempt to help further. Good luck!

Posted on Nov 17, 2009

Testimonial: "Hopefully that is the only problem with the coolant system. thanks for the tip, I appreciate it."

czaa
  • 4514 Answers

SOURCE: 93 Olds 98 Regency Elite 3800 engine; heat pn

hav car scanned for any bad codes--could also be a vacuum leak on heater control--haynes sells a good repair manual with detailed steps

Posted on Jan 16, 2010

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If you have an Owners manual, try looking for a fuse panel diagram. Your could have a bad connection inside the doorpanel which shorted the fuse. The seat drive motor must be wired to a separate circuit coming from the floorboard and its okay.
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Another Repair place you might try is a Glass Replacement shop. They install the inner workings of window tracks daily and remove the door panels to do it. They would be able to find your wires, test your window motor, and get you on your way quickly.

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I have a 1998 Oldsmobile bravada....just put new radiator, water pump, thermostat, radiator cap on and fluids are full....when i turn heat on....the ac automatically keeps kickin on causing me to only get...


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