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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old 09-30-2011, 05:39 PM
68 351 bronc 68 351 bronc is offline
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90 F150 heater blows cold

I need help. I have replaced the heater core and radiator thermostat. The engine operates at the correct temp but the heater blows just barley warm air. What do I check next?
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Old 09-30-2011, 05:43 PM
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White 97 xlt White 97 xlt is offline
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Make sure it is FULL of coolant, if so check the heater hoses to see if they are getting hot, at least as warm as the upper radiator hose.

If all is good there you may have a blend door disconnected/broken under the dash..
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Old 09-30-2011, 05:57 PM
68 351 bronc 68 351 bronc is offline
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Both heater hoses get hot. Is there a common problem to look for with the blend door/ controls?
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Old 09-30-2011, 05:57 PM
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