Question about 1978 Pontiac Bonneville

1 Answer

1993 bonneville no heat

Heater fan shut off tell I run over a bump...then will turn on and ajust it's self going over different bumps..

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  • Pontiac Master
  • 21,873 Answers

Could be a faulty blower motor or a connection in the wiring.
When it will not work, check the connection at the motor for power and ground.

Posted on Dec 09, 2012

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: heater and ac blower

I have an '04 with approx. 79000 miles; the blower is going out on mine too. The motor is probably burned out and you will need to replace it. It's about $90 for the part. Kind of a pain to change; I changed the blower motor on my 97 'prix and I had to lay upside down on the passenger seat and work on it upside down. Other than a little physically uncomforable, not too hard to do.

Posted on Nov 26, 2008

emissionwiz
  • 76109 Answers

SOURCE: My car heater works fine

this problem is most commonly caused by either a sticky air temp control blend door or a defective blend door electric actuator, this door controls the air temp at the heater/AC oulets.

Posted on Jan 14, 2009

  • 2 Answers

SOURCE: blower motor

I had the same problem and replaced the blower motor . it is located up under the glove box . and I test the old one and it would run fast if i shook it .the bearing or something wears out in them . I got one from a wrecked car for 20 verses 78 new . and it works fine . john

Posted on Jan 25, 2009

  • 11 Answers

SOURCE: Blower fan goes off with hitting a bump

Check to see if any of the wire connections are loose.

Neil

Posted on Mar 15, 2009

  • 1 Answer

SOURCE: 1993 pontiac bonneville electric cooling fans relay location

wher is the cooling fan relay

Posted on Apr 02, 2011

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My coolant fans don't work. What should I look for? I'm bringing it to a repair shop a mile away. Will it be safe to drive it that far? The temperature here is about 100 degrees outside now.


Hi,
If you start out with a cold engine, the Bonneville should not overheat traveling one mile, with out the A/C on.
If you are in stop and go traffic, roll your windows down, turn heater on high temp and high fan, and shut the Bonneville off at stop lights.
Watch the heat gauge.
The coolant fans not working may be a fuse, relay, or temperature sending unit switch.
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1 Answer

I have a 93 Saab and my vents aren't blowing heat. When I hit a bump in the road it may kick my heat on full blast for a couple of minutes, but as soon as I hit another bump, the heat kicks off. Also, the...


You don't say whether the fan starts and shuts off with the bumps, or the heat goes cold but the fan stays on. If it's the fan shutting off and coming back, you most likely have an intermittent connection to the blower motor somewhere at the fuse box, the fan speed control switch or the fan motor, or a loose ground connection at the fan motor. The fan motor is visible under the right side speaker grille on the dash. Make sure you re-connect the short black corrugated hose to the grill vent or you won't have defrosting on that side!

The air distribution rotary switch controls where the air goes. The fan speed switch controls exactly that: fan speed. the temp rotary switch controls the coolant temp into the heater core. You need to clarify what you mean by "Also, the dash controls for the vents won't allow me to turn up the power"

You might also have one or more of the following issues:
  1. is you vacuum tank properly connected and are there no leaks in the vacuum piping? The tank is in the driver side rear wheel well below the trunk deck on a convertible, and in the passenger side front fender area on the other cars. It's a white bottle with one or two hoses connected to it. If not properly on, your vacuum operated heater flaps won't move. Does the air distribution knob make sucking or hissing noises when you set it to different positions? If not, check the tank connections, look for vacuum line leaks, then suspect the vacuum valve behind the distribution knob.
  2. if the air distribution rotary switch makes noises when you change its setting, but nothing happens, then suspect the vacuum solenoids that open and close the heater flaps - could be a loose vacuum line or a defective vacuum solenoid
  3. the shaft connecting the temp control knob to the heater valve behind it may not be properly in place. This can be inspected, and adjusted if necessary, from the left side speaker/vent cutout on top of the dash. Make sure you re-connect the black flex hose to the air vent tube, or you'll get no defrosting afterwards!
  4. remember, the centre vents always blow cold air; a brilliant idea from Saab so the driver (and passenger) can get fresh air in the face and stay awake while the rest of the driver, passenger and car is toasty!

Oct 26, 2009 | 1993 Saab 900

1 Answer

2001 Volvo Fan - Unrealiable


Most likely the heater motor. To check tap the heater motor with it switched on if it starts blowing then thats the problem. to fix it's best to replace it I have tried to fix them and will work again until the next bump then they stopped again. It could also be a bad connection but this is unlikely as it won't come on at any setting. Cheers

Aug 30, 2009 | 2002 Volvo S60

2 Answers

Heater blower motor works intermittently


I would replace the blower motor, this sounds like a motor brush problem inside the motor itself.

Jan 24, 2009 | 1993 Pontiac Bonneville

1 Answer

Blower motor


I had the same problem and replaced the blower motor . it is located up under the glove box . and I test the old one and it would run fast if i shook it .the bearing or something wears out in them . I got one from a wrecked car for 20 verses 78 new . and it works fine . john

Jan 20, 2009 | 2002 Pontiac Grand Prix

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