no heat, help!
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New User
Joined: Nov 2007
Posts: 22
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no heat, help!
99 f250 4x4 7.3 superduty has no heat. A/c seems to work ok had similar problem last year and replaced heat control switch in dash. Same thing this year, a/c works fine but no heat when turned to red or heat setting. Blower works fine just blows cold air. Any thoughts on what may be sticking? Getting cold in MD and (excuse me but) Johnson goes full turtle on my morning ride to work. Any suggestions?
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
Check the coolant lines to/from the heater core. You might have something as simple as low coolant or a thermostat that's stuck open. However, if both lines are hot, then you have a temperature blend door or actuator problem.
Fleet Owner
Joined: Aug 2010
Posts: 21,253
Likes: 1,656
From: Reynoldsburg, Ohio
eBay has separate new motors and blend doors if that becomes an issue. I've used heater parts from a seller there, most notably the blend door because Ford sells you the entire heater core case---blend door by itself was just at $30.
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cobrar97
1987 - 1996 F150 & Larger F-Series Trucks
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Feb 20, 2008 05:56 PM
