Question about 1994 Chevrolet C1500

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My heater just stopped working on my 94 chevy truck. what should i be looking for

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  • adam_dale385 Jan 31, 2010

    never mind i just did the guy thing and hit the box a few times. it turned on

  • adam_dale385 Jan 31, 2010

    thank you modlara for responding. its the fan motor and i wasnt sure where to start. i read some posts and decided to give it a couple whacks, it turned on but for how long

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The hot water line from the engine goes through a valve that is controled by the temp control on your dash,older ones were cable control, the newer ones are usually vacuum controled,look for a vacuum leak at valve or dash control

Posted on Jan 31, 2010

Testimonial: "thank you for your quick respnse. the fan quit working last night. just hit the box under the dash a few times and it started blowing. "

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If the temp gauge shows the engine is warm, your t-stat should be ok. First check your coolant level, then check to make sure your heater core isnt clogged. Do this by running the engine with the heat on for a while, then shut it off and feel the hoses that lead to the heater core, be careful they do get hot. If one hose is hot and the other isnt the heater core is clogged, if they're both hot, its ok. If the heater core is ok then check your controls to make sure the temp door inside the vehicle is moving. Do this by listen for the movent while you turn the knob, or by feel of the air force it should change while being switched. If your vehicle has rear heat it may also be an issue with the hot water bypass valve, located under the vehicle near the passenger door.
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Posted on Feb 01, 2010

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Check your fuses under the dash an also under the hood on the driver side.

Posted on Feb 01, 2010

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