Heater kickout?
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Freshman User
Joined: Oct 2007
Posts: 39
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Heater kickout?
I have a 2000 F350 dually (112,000 miles ) that has seemed to be running great, although lately I have been racking up the miles ( 9K in 4 months ). Hopefully this will slow down a bit, but I digress.
Headed down the road this evening, running empty and no trailer. It's about 0 degrees F, and I had been running about 4 hours at ~55MPH. Ran up a series of steep grades just before I hit the hotel. The temperature gauge did not even seem to budge above it's normal reading. There seemed to be no power problem, but I lost heat in the cab.
Well, I was running with the temp control about 1/2 way between hot and cold. The air output went cool, but definitely warmer than outside. If I turned the temp control to cold, I got freezing air, but if I turned the control all the way to hot I got cool air. This was on all settings ( vent, foot, vent/defrost, and foot/defrost ). I suffered through to my exit. Once I got off the freeway and on the sidestreets to the hotel, the heat came back like normal ( plently of hot air ).
No leaks, or other problems that are obvious in the dark. I had the waterpump replace just before thanksgiving ( 5000 miles ago ). Any thoughts?
Thx's, Fred (jyblood@nwi.net)
Headed down the road this evening, running empty and no trailer. It's about 0 degrees F, and I had been running about 4 hours at ~55MPH. Ran up a series of steep grades just before I hit the hotel. The temperature gauge did not even seem to budge above it's normal reading. There seemed to be no power problem, but I lost heat in the cab.
Well, I was running with the temp control about 1/2 way between hot and cold. The air output went cool, but definitely warmer than outside. If I turned the temp control to cold, I got freezing air, but if I turned the control all the way to hot I got cool air. This was on all settings ( vent, foot, vent/defrost, and foot/defrost ). I suffered through to my exit. Once I got off the freeway and on the sidestreets to the hotel, the heat came back like normal ( plently of hot air ).
No leaks, or other problems that are obvious in the dark. I had the waterpump replace just before thanksgiving ( 5000 miles ago ). Any thoughts?
Thx's, Fred (jyblood@nwi.net)
Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
when truck is up to temp and heater bowing hot air..feel both heater hoses..they both should be hot..if one is a lot cooler then the other..you have a plugged heater core..if both are hot or close to same temps..your ether low on coolent or the t-stat is stuck open....
