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  #1  
Old 11-26-2010, 06:11 PM
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Heater

I have a 2003 F350 7.3L and my heater has stopped working. I checked the fuses they are all fine. I think it can be two possiblities the vaccuum booster is failing or the heater switch behind the glove box. Has anyone had any problems with either? or had their heater not work?
thanks
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Old 11-26-2010, 08:06 PM
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It just blows cold air. This is the second time its done it the first time it just started working again on its own. One thing i did before was i played with the vac lines on the vac pump and the pump vibrated with the key off and then the heater worked when i started the truck back up. I don't really count that as fixing the problem cause i really didn't do anything so i am hoping someone has had this issue and can help me out with what to do...
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Old 11-27-2010, 03:16 PM
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Works again this morning, didn't do anything but looked all the vac lines over and didn't see anything wrong. Anyone have some ideas?
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Old 11-27-2010, 08:14 PM
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Quote:
Originally Posted by Wildfire532FB View Post
Works again this morning, didn't do anything but looked all the vac lines over and didn't see anything wrong. Anyone have some ideas?
Check your coolant level.
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Old 11-27-2010, 08:19 PM
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Quote:
Originally Posted by Zander's 5.8 View Post
Check your coolant level.
It was at minium level so i filled it to max but it was working before i did that.
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Old 11-27-2010, 08:22 PM
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Man i hope it is that simple that the coolant was just low...
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Old 11-27-2010, 11:35 PM
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Quote:
Originally Posted by Wildfire532FB View Post
Man i hope it is that simple that the coolant was just low...
The coolant level would have to be lower than the min level to effect the heat. Next time your heat stops working touch the hoses going in and out of the heater core on the firewall and make sure both are hot. If one is hot and one is warm or cold it would indicate a clogged heater core.
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Old 11-28-2010, 07:08 AM
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OK i will check that next time.
How can i check and make sure the vac pump is working correctly?
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Old 12-24-2010, 08:39 AM
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I took the valve out of the heater line yesterday, seems to blow hotter. Not sure if this will fix it but i don't think it needs that thing in there anyway.
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