Thread: A/C and Heater Control Head problem?
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Old Oct 14, 2012 | 10:53 PM
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onehundred80
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Default Re: A/C and Heater Control Head problem?
Originally Posted by GraphiteGhost
On the 2008 Crossfire (mine) the valves 'pulse' based on the description on page 24-165 (Coolant Circulation Valve) of my 2008 manual. The last paragraph under (Operation) states " In normal operation the A/C Heater Control module switches the ground connection intermittently. The locking and closing times of the coolant circulation valve are subject to deviations between the actual temperature and set temperature ". Intermittently to me means on/off in pulses. I found 'pulses' directly somewhere else in the manual but if this post doesn't satisfy you I will reread until I find it. Maybe I will try to find the word 'pulse' or 'pulses' in the .pdf, or since it took me over two hours to find this reference, can you look for 'pulse(s)' in the .pdf?
I do not think under normal operation it would keep pulsing with the valve going up and down like a yo yo as the coolant would take a while to cool down enough with the valve closed before the signal to send more water through the system. If the valves were jammed then you may get pulsing, I do not know.

What do you get when
1, you use only AC on full cold setting.
2, on a half way setting with AC.
3, no AC with full heat.

What do the valves do then?
 
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