Hi
My name's Dave and I'm located in Australia. I have just recieved a new company car, known as a GM Holden VE Commodore station Wagon. The vehicle uses and Air International Thermal Systems HVAC module with a Denso ECVD compressor. I believe the manufacturer is being quite conservative with their air conditioning effeciencies. The operation seems to cater more for fuel consumption than performance. Putting it basically it just doesn't get cold enough. With reasonably high ambient temperatures (around 35 centigrade) the vent temperatures start off around 5 degrees and within a very short period of time step up to 9, then 12, then 15 as the interior cools slightly. This is with the temp control set as "C" for cold and the vent on recirculate. The HVAC accepts inputs from an outside ambient temperature sensor, and inside temperature sensor via an aspirator, a photoelectric sun load sensor and an evaperator temperature sensor. My question is can I substitute a resistive load to one of the sensors, for example the interior temperature sensor to indicate to the HVAC module that the interior temperature is in fact hotter than it is? My guess is the compressor would not be cycled down as much and vent temperatues may remain lower? Would I also need to modify the outside ambient temperature sensor and possibly the sun load sensor? Hoping someone out there may be able to assist. I can provide a URL to a site with further details particular to my vehicle if required. Thanks, Dave
My name's Dave and I'm located in Australia. I have just recieved a new company car, known as a GM Holden VE Commodore station Wagon. The vehicle uses and Air International Thermal Systems HVAC module with a Denso ECVD compressor. I believe the manufacturer is being quite conservative with their air conditioning effeciencies. The operation seems to cater more for fuel consumption than performance. Putting it basically it just doesn't get cold enough. With reasonably high ambient temperatures (around 35 centigrade) the vent temperatures start off around 5 degrees and within a very short period of time step up to 9, then 12, then 15 as the interior cools slightly. This is with the temp control set as "C" for cold and the vent on recirculate. The HVAC accepts inputs from an outside ambient temperature sensor, and inside temperature sensor via an aspirator, a photoelectric sun load sensor and an evaperator temperature sensor. My question is can I substitute a resistive load to one of the sensors, for example the interior temperature sensor to indicate to the HVAC module that the interior temperature is in fact hotter than it is? My guess is the compressor would not be cycled down as much and vent temperatues may remain lower? Would I also need to modify the outside ambient temperature sensor and possibly the sun load sensor? Hoping someone out there may be able to assist. I can provide a URL to a site with further details particular to my vehicle if required. Thanks, Dave