Question about 1992 Pontiac Bonneville

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1992 Pontiac Bonneville SE, steam in passenger compartment?

I've recently come across steam coming into the passenger compartment, the windshield steams up like a mirror when taking a shower. I've experienced about a quart to a half gallon coolant loss daily.

Yesterday I changed the theromostat, the O-ring was severely eaten and corroded, but now, the heater will not come on at all. I attempted to drive it to work today, and the cabin filled with steam again. I've pulled the blower motor and it smells burnt, but it does rotate. Any advice????

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  • 3 more comments 
  • allenddiamon Feb 23, 2009

    I've thought about the heater core, but that doesn't explain to me why the the heater blower was working yesterday, and then after replacing the thermostat, the blower motor completely stops working. Or would it?

  • Anonymous Feb 24, 2009

    Ok, I have changed the heater core...NO STEAM,,,,,but, the heater is still not working. Does anyone have a fuse box chart for the 92 Bonne, I don' have one anymore

  • Anonymous Feb 24, 2009

    So does anyone a link to the fuse box diagram to the 92 Bonneville. I've lost mine

  • Anonymous Feb 25, 2009

    Does anyone have the fuse box charts for the 1992 Bonneville?

  • Anonymous Mar 27, 2009

    i had to replace my heater core in my bonneville, it was doingteh same thing and finally it busted and the whole passenger side floor was soaked

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You need a heater core for starters...probally could use a full system flush also. Check condition of all hoses and replace as needed....also check radiator condition and replace if necessay. I have found that once one problem occurs in the cooling system it's a good idea to make sure everything is in good shape or you will wind up chasing leaks everywhere...good luck...

Posted on Feb 23, 2009

  • Sound-Chaser Feb 24, 2009

    The blower may have become contaminated with anti-freeze that has been leaking from the heater core and shorted out. It could also just be the blower fuse has blown due to the blower shorting out. Run a fused test wire from the battery + terminal directly to the blower and see if it come to life. If it does'nt you need a new motor and probally a fuse....hope this helps....good luck

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