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There could be several reasons why the heater in your 1989 Brougham Cadillac isn't working. Common issues include a malfunctioning thermostat, a clogged heater core, or a problem with the heater control valve. Additionally, low coolant levels or a faulty blower motor could also prevent warm air from circulating. It's best to diagnose the issue systematically to determine the exact cause.
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The heater in your 1989 corvette wont heat i replaced the heater core and it still wont heat.?
Low coolant level? Cooling system airbound? Bad thermostat? Water pump not circulating coolant? Heater control cable not working?
Fleetwood brougham BLOWER won't turn on?
I have a 1978 coupdiville cadillac my blower quit working and there is a relay above your fuse box and if it goes bad your heater wont turn on. I had to replace it with a after market heavy duty relay away from where it is originally plugged in. Also my ground wire connection was dirty and wouldn't turn on until I cleaned the connection so try that and see if it works or you might need to replace the motor.
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you have a bad heater core
Heater is not working does the heater core have something to do with it?
that has a lot to do with.if your heater core is pluged up you wont get any heat out of it.
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Open hood . Disconnect blower module located near blower fan. Disconnect, if blower shuts off, repalce module
What would cause no heater fan to blow on 1978 Cadillac fleetwood?
I have a 1978 coupdiville cadillac my blower quit working and there is a relay above your fuse box and if it goes bad your heater wont turn on. I had to replace it with a after market heavy duty relay away from where it is originally plugged in. Also my ground wire connection was dirty and wouldn't turn on until I cleaned the connection so try that and see if it works or you might need to replace the motor.Fleetwood_brougham_BLOWER_wont_turn_onDiscuss:Fleetwood_brougham_BLOWER_wont_turn_onFleetwood_brougham_BLOWER_wont_turn_onbrougham BLOWER wont turn on?&content=&lng=en&uid=X4b8f331cb1dc6e1a Fleetwood_brougham_BLOWER_wont_turn_onbrougham BLOWER wont turn on?&content=&template={{title}} {{url}} (via @WikiAnswers)&lng=en&uid=X4b8f331cb1dc6e1a
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Piston heater element open.
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bypass valve not opening
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