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Questions and Answers

Toyota Pickup Blows Cold Air

Q. Dear Mr Ciulla, the heater on my 1985 Toyota pickup blows cold air. I let the vehicle warm up and the blower motor works great. Do you think it might be the thermostat? Or it might be that the heater core is plugged? And if so how do I check it? Also all the climate control sliders seem to be working good.

Thanks for any help you can give,
AGG

Toyota Pickup Blows Cold Air

A. I would put a new thermostat in first. They are cheap and easy to replace. And that is, most likely, the cause of your lack of heat.

If you still have little or no heat, let the engine run for a while and turn the heat and blower on HIGH. Then feel the heater hoses at the firewall, one hose should be noticeably warmer than the other. If they are both equally hot, then you probably have a clogged heater core.

Another possibility is a bad Heater Control Valve. This turns on and off the flow of coolant to the heater core depending on the position of the temperature control lever.

Toyota Pickup Blows Cold Air

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