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Sticking thermostat could cause this. If the thermostat is stuck open, it never gives the engine a chance to fully heat the coolant. Follow the top radiator hose to the engine, remove the hose and remove what it hooks to and there's your thermostat.

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โˆ™ 2008-12-08 23:21:49
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Q: Your 1997 SC1 Saturn heater works but does not blow hot enough what could be wrong?
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What is wrong if a 1997 Saturn SC2 heater does not work and it is not the thermostat?

if the blower motor works most likely heater core is bad. need more info

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It could be that your head gasket is blown.

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the reason for water coming out from under the dash is that a hose could have broke or you have a problem with your heater. your heater works off of the water in the radaitor and since it gets hot from the motor well it serculates threw the heater and that's who your heater works

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That or the thermostat.

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If it now works it could be a bad connection to the sprayers.

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Eventually heater will stop working when coolant level gets low enough. Pressure test system to determine where leak originates

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I recently bought a 1992 Grand Prix and the heater died but the rear defrost still works Any suggestions?

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If the rear heater works ok why does the front heater only blow cold air?

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Why has the heater in my 1996 Chevy blazer stop working?

It could be a blocked heater core if your fan works... Or it could be your thermostat... I have an 03 that is doing the same thing. I just replaced the thermostat and it is still doing it. There is a site called you may get some better answers there

When your heater works but does not blow any air what could the problem be?

Does blower operate at all? If not it could be blower motor, fuse/fusible link, faulty switch, blower resistor pack...sorry not enough info for much more help than that (model, year, just heat not working...or a/c also?)