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post #1 of (permalink) Old 12-06-2002, 09:23 PM
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it is winter time right? well i cant seem to make any heat in my bronco,, i have did a flush and fill new thermostat (180) and replaced the heater hoses,, run bronco about 25 miles 1 way to work and both heater hose are hot (so i have coolant flowing through the heater core) even blocked off rad with cardboard still no heat,, next step replaced rad. cap after driving around all day x-mas shopping,, coolant wasnt even hot or have pressure b-hind it,, it almost seems as if the engine is not making heat to open thermostat is this possible? and any suggestions on a fix? cold in pa.. hahahaha [img]images/graemlins/confused.gif[/img]
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post #2 of (permalink) Old 12-06-2002, 10:01 PM
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Re: heat?

Did you make sure that the knob was in the red area, not the blue? [img]images/graemlins/grin.gif[/img]

Sorry, I can't tell you what to look for cause it looks like you already checked all that I could come up with. I just couldn't help myself when I read that. Again Sorry [img]images/graemlins/wink.gif[/img]
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post #3 of (permalink) Old 12-06-2002, 11:09 PM
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Re: heat?

First thing that comes to mind when you say no pressure is to make sure your radiator is full.
I assume your blower is working and the intake and all of the air ducts and duct "valves" are working properly?
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post #4 of (permalink) Old 12-06-2002, 11:45 PM
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Re: heat?

Mine has the same problem. Heater is on high, hoses are hot, and no hot, or even any warm air comes out. I have replaced the thermostat(180), and heater core, but I have heard that the fan gets clogged with leaves, but I have yet to check that, so that might be the problem.
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post #5 of (permalink) Old 12-07-2002, 07:10 AM
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Re: heat?

The 180 thermostat isnt hot enough, i know i just pulled the 180 degree high-flow Robertshaw out i had in mine cause the heater didnt work. I thought that a 180 degree was factory but its *supposed* to have a 195!
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post #6 of (permalink) Old 12-07-2002, 07:39 AM
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Re: heat?

If the fans clogged with leaves you would hear a sound similiar to paper hitting a fan everytime it is engaged. If you arent getting any pressure, think maybe its your water pump.
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post #7 of (permalink) Old 12-07-2002, 10:57 AM
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Re: heat?


Nobody likes to be cold in the Winter that's for sure. McDerry's right bout checking the air flow blockage in the heater box. Broncomania has hit the nail on the head too. I noticed you're an EFI bronco, you should be running 195 all year for optimum mileage and emissions. If that ain't enough both Robert Shaw and Stant (a division of Gates) make 205 degree T-stats(Stant #13352). That's what keeps us Canadians warm up here .

Be advised that the 205 will test out all weak points of your cooling system in that it builds pressure longer and if you've got any dodgy hoses, you'll soon find out. The high flow Robert Shaw T-stats will be easier on your system pressure for sure.

What do you run in the Summer ? I was always told EFI vehicles should run 195 all year round, as a minimum. If you're overheating with that in the Summer, maybe it's a flow issue in your system and you need a backflush.

Two hundred and five degrees and toasty here in back bacon land

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post #8 of (permalink) Old 12-08-2002, 11:54 AM
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Re: heat?

Sounds to me like the cable that actuates the blend door may be broken/disconnected, or the blend door is jammed.
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