Heater not working
I read the other thread and am staying well clear.
1998 3liter 6cyl XLT 60k mi, 3 months new to me - A/C worked great when I bought it but I didn't check heater. Now that it's cold it blows virtually no heat. It's 40F outside, I just drove ten miles, for these conditions: Engine heat gauge is a tad below midrange Heater control is at defrost (or any non-A/C position) Checked for adequate water in cooland reservoir tank (1-2") Upper large radiator hose is hot Heater hose into firewall (bottom) is hot Heater hose from firewall (top) is cold (goes to heater valve) Heater hose on engine side of valve is cold No vacuum at heater hose valve So apparently there is a interior valve which is impeding water flow into the heater core Or heater core is plugged A/C compressor keeps cycling while I'm checking altho A/C is turned off! WHY? |
Heater IS NOW working
I went to see my mechanic who suggested the heater core was clogged. He said the best fix was back flushing the heater core. And to be careful NOT to back flush the engine back as the crap kicked loose would only serve to clog the radiator in a few months time.
So, I went to my Ford quick lube shop who did the deed of heater core only b/f. Now I have hot air!! And I have antifreeze in the truck with the winter coming on. Plus I have an oil change and list of things they spotted needing work. That's the advantage of a quick lube at the Ford dealer, they know their goods. |
Re: Heater not working
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http://www.s10mods.com/wp-content/up...re-flush-4.jpg |
Re: Heater not working
Thanks, Terry. I've not had a heater core clog before and I'm happy to know now how to unclog it. That Kodak Easyshare camera does a great job (or did in 2008 when you took the picture).
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Re: Heater not working
Hey,
I have very light heat in my 99' 2.5 ranger. i found a broke vac hose going to my heater valve. i cut the end clean and re-attached it. but still no heat nor any vacuum on that hose. Do i need to follow it under the fender and replace it? i have decent vacuum on most hoses and very light vacuum going to my egr valve ( disk). not sure if that pertains to this issue or not. any advice would be greatly appreciated. also my ac clutch kicks on and off all the time |
Re: Heater not working
Corrected: hose does have vacuum when max ac is on. which i assume is normal. the top radiator hose is hot and the bottom is warm. the right heater hose is hot and the left heater hose is warm...so im guessing flush the core or try changing the therm. I have read many posts where changing the therm. does not help though
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CORE:this seems to be common, on the 4clangers, I've had to do it twice. last yr n this yr.... common for the core to get clogged, (must be a corrosion issue) just remove both core lines, and flush with a water hose both directions thru core.. ---------- Quote:
example: diaphragm "in" is closed, "out" is open.. you should be able to move it with your finger. A/C clutch: works on all setting to circulate the systems oil.. I dnt think it runs the compressor on "vent" only |
Re: Heater not working
The valve is out at all times it seems. even when max ac on. it only goes in if a push it in. then it pops right back.
---------- UPDATE: flushed the core and clean water came out both sides. I am no mechanic at all. so any info would help. It may end up being the thermostat. Should i have air blowing into the engine compartment from that air box against the passanger side of engine ? it is a box that looks to be snapped shut and has an ac line running into it |
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Re: Heater not working
I know this is repetitive as TDMiller has said largely the same things but if you're desperate a rewording of the issue might help.
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Re: Heater not working
could it be an airlock in the heater core?
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