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post #1 of 7 Old 08-27-2012, 06:15 PM Thread Starter
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No heat issue

My 2003 F250 the heat doesn't appear to be working it has work a time or 2 it seems like when it works the gauge is reading higher than when it doesn't. there fore I am feeling like it is the T stat any thoughts?

I haven't had this truck but about 4 months so haven't used the heat much but having some cooler mornings now.


If it is the T stat should I go with the 203* or the factory 195* ? the oppinions i have been reading about are mixed, I don't want to damage the engine but don't see how raising the engine temp 8* would have an adverse affect?

Also who makes billet housings beside Dieselite? I will be going with the billet housing regaurdless of which T stat I go with.



Last edited by Tugs; 08-27-2012 at 06:18 PM. Reason: adding more info
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post #2 of 7 Old 08-29-2012, 05:23 PM
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Check the hoses going to the heater core at normal operating temp. If the core is clogged one line should be hot / warm and the other will be noticeably cooler.

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post #3 of 7 Old 08-29-2012, 07:31 PM Thread Starter
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Where should the gauge be reading on the instrument panel mine reads almost at the low mark like not even 25% of the gauge?
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post #4 of 7 Old 08-30-2012, 07:24 AM
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About mid way...

Stealing for a living , Go big or Go home

00 f-350 4 door long bed 4X4
Nitto Terra Grapplers
7.3 4" downpipe with 5 " Exhaust Stacks
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post #5 of 7 Old 08-30-2012, 07:39 AM Thread Starter
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So would you think my t stat is bad?

Last edited by Tugs; 08-30-2012 at 03:21 PM.
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post #6 of 7 Old 08-30-2012, 03:01 PM
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Sounds like it is stuck open

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post #7 of 7 Old 09-23-2012, 05:03 PM Thread Starter
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OK heres an update I changed the tstat the next day heat worked, needed heat about a week later fired truck up let it idle for about 5 min took off down the road, heat never did get hot?? cold as ice?? That afternoon after work fired truck up drove about 5 miles turned heat on it was working fine???? Does anyone have a clue Possibly the blend door? My problem is it doesn't do it every time???? HELP
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