Question about 1985 Chevrolet Chevy

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Heater blower did not work and does not produce heat. Had blower replaced, cost 200 bucks. Blower works now but still no heat. Thermostat? Heater core? what do I check next?

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Back flush the heater core could be pluged up with scale, if that don't help than try a thermostat but do the flush first.

Posted on Nov 20, 2009

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The divider door is not opening staying on cool. check the temp. knob out

Posted on Nov 20, 2009

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I had the same problem and remedied it by disconnecting the heater core at the firewall (you have to remove the plastic shield by the windshield to access) and filling the core with radiator flush. I let it sit for 4-5 hours and then flushed the core with water from my garden hose. To make the connection, I cut a rubber washing machine supply hose, which fit inside the tubes to the heater core.

Once flushed, I added "Water Wetter" to remove any air bubbles from the system. heat now works great.

BTW - both the dealer and and independent said I needed to replace the heater core, at a cost of $1500. Glad I tried this first! Good luck!

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