Question about Buick LeSabre

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'02 Buick LaSabre. heater blowing cold. Things I've tried. Plenty of coolant in the system. With engine running and warmed up, checked both heater hoses and they are hot to the touch. What do you think?

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Hi, some cars have a HEATER FLAP. if not CLOSING then cold air will be blown in. LEAVE ENGINE OFF and check the lever and listen for the SLAP of the flap CLOSING. the control cable is faulty. or the ELECTRONIC HEATER CONTROL NOT WORKING or the HEATER RADIATOR (UNDER DASH is BLOCKED). or AIR in SYSTEM. needs bleeding. gerry

Posted on Sep 13, 2010

  • evia573 Sep 13, 2010

    Flap working. If bleeding is necessary how complicated is it?

  • gerald white Sep 13, 2010

    hi, take the highest coolant pipe and pour water into it see how much go's in and may need to put some water in the filler as well until air comes out connect it back-up and tighten coolant cap. now run engine and see if it gets hot, if not then the thermostat may be stuck OPEN. gerry



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