Heating ? - DaveC, BigDad, LPB, PSA---anybody!

*stevieray* · 10-24-02, 04:47 PM

Lately, have noticed that at idle (like warming up in the AM), my heater blows semi-cool air. This also is the case when I pull up to a stop light or am in traffic. However, when I get over about 1K RPMs the heater blows all of the hot air you would ever want. A Acura tech whose opinions I respect is stumped---he says it appears I have some type of circulation problem but can't figure out where. Has anybody run across this before? I have no radiator leaks (pressure tested last week), HG is OK (hydrocarbon test last week, too) and a brand new thermostat. Any suggestions?

Dave C ver2.0 · 10-24-02, 06:48 PM

Classic example of air in the cooling system. Time to bleed her Steve (and look for leaks).

Mckenzie93 · 10-24-02, 09:13 PM

Quote:

Originally posted by Dave C ver2.0
Classic example of air in the cooling system. Time to bleed her Steve (and look for leaks).

Yup..... that was the last straw for me to do the HG repair on my 91 sedan. It happened in February when the temperatures were like -30C, and when I was in traffic, my heat would disappear and turn into AC.... It is air in the system..... the only way to fix it is to bleed it out, but then find out where it was coming back in.... that sux Steve.... not another one

LPB · 10-25-02, 07:09 AM

After you bleed the system if the problem continues I would check the air mix control system and linkage.

bigdad · 10-25-02, 11:10 AM

yup, sounds like air in the system...when you bleed it make sure the heater is on full blast and the car is at operating temp.....sounds like the heater core gets airlocked until the water pump forces enought water around to circulate properly....if there is air, there is likely a leak (or it was never completely removed when theromstat etc. was done)....sometimes the bleeding has to be done a couple of times....be patient

10-24-02, 04:47 PM	#1 (permalink)
stevieray Swollen Member Join Date: Jan 2002 Location: Franklin, TN Posts: 7,577 Car 1: '95 LS Coupe Car 2: '91 LS Coupe Car 3: '97 NSX-T iTrader: (14)	Heating ? - DaveC, BigDad, LPB, PSA---anybody! Lately, have noticed that at idle (like warming up in the AM), my heater blows semi-cool air. This also is the case when I pull up to a stop light or am in traffic. However, when I get over about 1K RPMs the heater blows all of the hot air you would ever want. A Acura tech whose opinions I respect is stumped---he says it appears I have some type of circulation problem but can't figure out where. Has anybody run across this before? I have no radiator leaks (pressure tested last week), HG is OK (hydrocarbon test last week, too) and a brand new thermostat. Any suggestions? __________________ *"King of Kleen"* "Know this. Being able to purchase a Legend and being able to afford a Legend are two separate things. Realize nothing post-purchase is cheap." - LegendGS

10-24-02, 06:48 PM	#2 (permalink)
Dave C ver2.0 rh eller Join Date: Jan 2002 Location: Rockville Md Posts: 1,951 Car 1: 92 L sedan and 88 LS sedan (wifes) iTrader: (1)	Classic example of air in the cooling system. Time to bleed her Steve (and look for leaks). __________________ Started rebuilding IC engines in 1968 at the US Merchant Marine Academy. Don't think you know more than me about auto/IC/control systems unless you can document your education.

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10-25-02, 07:09 AM	#4 (permalink)
LPB Registered User Join Date: Mar 2002 Location: Massachusetts Posts: 4,144 Car 1: 1992 Seattle Silver LS CPE Car 2: 2007 Toyota Corolla Car 3: 1981 Corvette iTrader: (2)	After you bleed the system if the problem continues I would check the air mix control system and linkage.

10-25-02, 11:10 AM	#5 (permalink)
bigdad Registered User Join Date: Feb 2002 Posts: 1,450 iTrader: (0)	yup, sounds like air in the system...when you bleed it make sure the heater is on full blast and the car is at operating temp.....sounds like the heater core gets airlocked until the water pump forces enought water around to circulate properly....if there is air, there is likely a leak (or it was never completely removed when theromstat etc. was done)....sometimes the bleeding has to be done a couple of times....be patient

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