A/C blowing hot on one side

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jamhow

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I have searched and see several of you have this problem, but have a question that I haven't seen an answer to. When my a/c starts blowing hot air, I can turn off the ignition and the problem is solved when I restart. It may go 5 min. or 5 hrs. before it acts up again, but restarting the engine always makes it work correctly. Does that bit of info narrow down my search any at all in determining which component is failing?

If I set the temp on 60 degrees before I restart, the hot air problem doesn't occur. Just trying to keep away from that dealer. Would appreciate any suggestions.
 
jamhow said:
I have searched and see several of you have this problem, but have a question that I haven't seen an answer to. When my a/c starts blowing hot air, I can turn off the ignition and the problem is solved when I restart. It may go 5 min. or 5 hrs. before it acts up again, but restarting the engine always makes it work correctly. Does that bit of info narrow down my search any at all in determining which component is failing?

If I set the temp on 60 degrees before I restart, the hot air problem doesn't occur. Just trying to keep away from that dealer. Would appreciate any suggestions.
Click to expand...

It is still the DCCV. Mine did that for about a year before it failed completely.
 
i would clamp off the hose's to the dccv after it has stopped working right (with pout restarting the car), and see if the hot air is gone

if it is, theres your problem
 
jamhow said:
I have searched and see several of you have this problem, but have a question that I haven't seen an answer to. When my a/c starts blowing hot air, I can turn off the ignition and the problem is solved when I restart. It may go 5 min. or 5 hrs. before it acts up again, but restarting the engine always makes it work correctly. Does that bit of info narrow down my search any at all in determining which component is failing?

If I set the temp on 60 degrees before I restart, the hot air problem doesn't occur. Just trying to keep away from that dealer. Would appreciate any suggestions.
Click to expand...

It sounds like you have a gen I LS. Is this true?
The gen I has a cold air bypass door that will stay in the bypass position as long as you keep at max cooling all the time.
You need a new DCCV.
 
Before spending any money, try running the self-test as described in http://www.justanswer.com/ford-linc...s-blowing-hot-air-passenger.html#SeeTheAnswer

I have an '01 LS V8 that started blowing hot air out of one side last year. Had every intent to replace the dccv as recommended here, but came across several postings mentioning the datc/dccv self test. Ran the "OFF and FLOOR buttons simultaneously and then pressing the AUTO button within two seconds" which started the test. As the test ran I could hear the ac-heater doors/flaps opening and closing. It finished with no messages and my ac has been running perfectly (knocks on wood) since.

Anyhow, only takes a minute and doesn't cost anything, so is worth running before anything else.

Good Luck...
 
rudy.elgato said:
Before spending any money, try running the self-test as described in http://www.justanswer.com/ford-linc...s-blowing-hot-air-passenger.html#SeeTheAnswer

I have an '01 LS V8 that started blowing hot air out of one side last year. Had every intent to replace the dccv as recommended here, but came across several postings mentioning the datc/dccv self test. Ran the "OFF and FLOOR buttons simultaneously and then pressing the AUTO button within two seconds" which started the test. As the test ran I could hear the ac-heater doors/flaps opening and closing. It finished with no messages and my ac has been running perfectly (knocks on wood) since.

Anyhow, only takes a minute and doesn't cost anything, so is worth running before anything else.

Good Luck...
Click to expand...

The test won't find mechanical problems with the DCCV. It stuck once, it'll probably stick again. If it's not leaking, you could take it apart and clean it up, then you might not have more problems with it.
 
i had the same problem it first started blowing hot on one side then started blowing hot every were i did some trouble shooting and came across the heater control valve i changed it and it was fixed ..................and if you need a heater control valve i got one for sale almost new .....so let me know
 
is not really called a heater control valve, its called a DCCV!
 
1LoudLS said:
is not really called a heater control valve, its called a DCCV!
Click to expand...

Actually, different parts of the factory service manual refer to it differently.
I've seen
DCCV - Dual Coolant Control Valve
Dual Coolant Flow Valve
Heater Control Valve

I do agree that DCCV is the most accurate term.
 
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