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My 85 did the same thing ,replace the heater core . john == another thought== Check first if fuse is blown,then pull fan blower motor,take and connect to proper power source and see if blower works,then check see if hoses are connected to heater core before removal,sometimes there is a valve to turn off flow to core.And sometimes during summer hose from pump to block to bypass heat.Then check make sure theromostat is correct,have seen these put in backwards.If all else fails before pulll core do a back flush,a lot of junk gets into core. ____________________________ Also, if your car has the auto climate controls, check the heat sink.

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โˆ™ 2007-01-16 14:00:09
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Q: Why would the heater stop blowing warm air in a 1985 Olds Delta 88?
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