Question about 1986 Buick Skylark

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1986 Buick Skylark heater blows out cold air

Heater is not working.Checked the coolant,thermostat,heater core don't
know what else to check.Also checked the fuses. Any ideas why it is
blowing out cold air. Just had it in for an oil change,front end alignment
mechanic said the hoses coming from the radiator are warm and he
flushed out the hoses thinking their might be a blockage.

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In many cars there is a flapper valve in the ductwork which is sometimes vacuum actuated.If this flapper is stuck or the vacuum line is unhooked or deteriorated,you will not feel any warm air at the vents.Look under the dash for rubber vacuum lines or try moving the selector knob for HOT/COLD or FEET/VENT/DEFROST while revving engine alittle to increase vacuum.

Posted on Jan 17, 2009

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