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08-09-2008, 09:57 PM | #31 | |
SHO No Mo
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Re: Dual climate control blowing heat on AC
Code 1947 indicates that there is a short circuit to ground in the Evaporator Discharge Temperature Sensor circuit. You can start by pulling and the lower of the two temp sensors on the driver's side which is discussed in this thread. The lower sensor is the sensor in question. Check the sensor and wiring for the sensor for a short to ground.
-Rod |
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08-11-2008, 08:09 PM | #32 | |
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Re: Dual climate control blowing heat on AC
the sensor that you mentioned, where is it and how do i go about removing it? should i just replace the sensor or troubleshoot further?
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08-12-2008, 06:26 AM | #33 | ||
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Re: Dual climate control blowing heat on AC
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-Rod |
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08-14-2008, 11:11 AM | #34 | ||
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Re: Dual climate control blowing heat on AC
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Is the part that I need also called a heater control valve and is it located adjacent to the radiator? One dealer mechanic told me that there are two valves, one located in the dash and one located under the hood. Could someone please clarify? |
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08-14-2008, 01:04 PM | #35 | |
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Re: Dual climate control blowing heat on AC
The Dual Coolant Control Valve (DCCV) is located under the hood near the radiator. It has two valves in it which regulates the flow of coolant to the dual heater core elements inside the car. There is no valve for the coolant flow inside the car/under the dash. Hopefully the dealer technician that told you that will not be the one working on your car.
On older cars, the heater control valve did serve a very similar purpose to the DCCV, but was often vacuum actuated (DCCV is electronically actuated). Someone who's been in the business awhile may refer to the DCCV as a "heater control valve." -Rod |
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08-14-2008, 05:39 PM | #36 | ||
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Re: Dual climate control blowing heat on AC
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08-14-2008, 10:24 PM | #37 | ||
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Re: Dual climate control blowing heat on AC
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-Rod |
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08-15-2008, 06:54 AM | #38 | ||
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Re: Dual climate control blowing heat on AC
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08-15-2008, 05:53 PM | #39 | ||
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Re: Dual climate control blowing heat on AC
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08-15-2008, 11:04 PM | #40 | |
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Re: Dual climate control blowing heat on AC
Is the compressor clutch engaging and staying engaged? If so, that's not really anything to worry about. If it starts cycling rapidly, that would indicate either a low charge of R-134a, an overcharge condition, or some other fault in the system.
-Rod |
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08-16-2008, 11:48 AM | #41 | |
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Re: Dual climate control blowing heat on AC
thank you for all your help. I removed the sensor and nothing was noticeable to the eye or to a multimeter so i swapped it with the upper sensor on the driver side. AC works fine as far as i can tell this fixed the problem. I ran the self diagnostic again and no errors were shown. Should i still replace the sensor that i moved to the top to prevent future problems??
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08-16-2008, 01:31 PM | #42 | |
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Re: Dual climate control blowing heat on AC
Yep, I'd suggest you still replace it. You swapped it with the driver's side air discharge temp sensor. The air out of the driver's vent may not regulate as well as it should, and maybe that won't become apparent until winter/cold weather.
Considering that the part is only $16.19 MSRP and is pretty easy to replace, I'd change it out. At least your confidence is high that that will fix your concern completely. FWIW, my bad sensor looked fine and there was no obvious problem based on a multimeter test. However, my scan tool indicated it was bad in the datastream mode, and the readings followed the sensor when I moved it so I was confident I didn't have a wiring issue. -Rod |
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08-23-2008, 10:20 AM | #43 | ||
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Re: Dual climate control blowing heat on AC
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08-23-2008, 10:54 PM | #44 | |
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Re: Dual climate control blowing heat on AC
I think you need to figure out how to get the codes (if there are any) from the DATC unit to see if it guides you to any one particular component. The DCCV is an electronically controlled pair of valves, but everything else in that circuit will also be electronic (hence the need for a fuse) and therefore I'm not sure that I'd say the DCCV is more likely to be the problem than the A/C clutch, coolant pump, etc.
-Rod |
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08-25-2008, 05:57 PM | #45 | ||
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Re: Dual climate control blowing heat on AC
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