Question about 1999 Chevrolet Silverado 1500

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Heater doesnt work, A/C works fine, changed thermostat no fix.

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Electrical problem.....check fuse

Posted on May 27, 2010

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Heat stays on with thermostat off


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My 1999 ford taurus heater doesnt work. We recently had a problem with the reservoir boiling over and brown coolant. Had the thermostat replaced and replaced the radiator cap. Also flushed the radiator....


Sounds like the heater core may be blocked..First check the level make sure its full..Then let the vehicle get up to operating temperature..Feel the heater hoses going into the firewall..Both should be hot to touch..If one is hot and the other one is warm or not warm ,,then you have a blockage in the heater core..If its block ,,then i have cleaned them out by taking the heater hoses off,,and running a garden hose through the heater core..If that doesnt work then you have to remove the dash,,and replace the heater core..

Sep 24, 2011 | 1999 Ford Taurus

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My in heater in a 2007 grand prix doesnt work the air blows but isnt hot temperture gauge looks fine an have changed out thermostat


You have a plugged up heater core. Try pulling the heater hoses of where they go into the firewall, put a garden hose with a spray nozzle in one hose and gently flush the system out. you will need to pull both heater hoses off to do this.

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Changed thermostat, but heater still doesnt work


try flushing the heater core out ,if that doesnt work a piece of cardboard in front of the rad

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Heater not heating on 2002 suburban fan blows just does not heat up any ideas culd it be a relay switch


No, Relays control the fan running. But you said it is running. Low coolant level, clogged heater core or sticking temperature door could be the problem. Is the engine running at normal temp? Open thermostat could cause low temperature.

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2002 dodge caravan front heater blowing cold air all the time . upper heater vents and defroster work fine. how do i fix the floor heater?


Change your thermostat I was having the same problem and also check that you have enough Preston. Hope this helps.
Kim

Jan 24, 2010 | 2002 Dodge Caravan

1 Answer

Heater not working, blower is fine. I heard it may be the thermostat sticking. Does this sound familiar?


If your blower is working it is likely the thermostat. Have your cooling system flushed and replaced with new coolant being careful to use the proper type.

If this doesnt work you may need either a new radiator or heater core. Sounds like the cheaper fix though and you wont waste your money. It's good for your engine life

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Changed thermostat heater work couple days then stated blowing cold air again


try topping the rad up ,if that doesnt work then pull one of the heater hoses off and bleed the heater

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Heater doesnt work


Check your colant level it might be low and if its top it up with proper collant ratio......and if that doesnt work replace your thermostat...... then let me kno wwat happens?

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