doggy1
Member
Diagnosed & repaired aircons, replaced compressors, replaced accumulators, replaced evaporators, regassed, repaired air movement motors, replaced sensors, repaired flaps and so onWhat do you mean by worked on?
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Diagnosed & repaired aircons, replaced compressors, replaced accumulators, replaced evaporators, regassed, repaired air movement motors, replaced sensors, repaired flaps and so onWhat do you mean by worked on?
Some one worked it out, from memory there was a thread about it somewhere, If you set the temperature to a certain temperature that is the temperature that the air is at the vents, the only way to stop the heaters from coming on is to set the temperature to Lo
It is in most cars. It is controlled by the fan speed at lower temperatures 16~19 but as you dial it up it also uses the heater core to warm up the air because slowing down the fan to the lowest doesn’t cut it.
Then I believe you already know the climate control uses a combination of aircon and the heater core. You must’ve seen the flappers.Diagnosed & repaired aircons, replaced compressors, replaced accumulators, replaced evaporators, regassed, repaired air movement motors, replaced sensors, repaired flaps and so on
Well, the original experiment was to see the net energy use difference between leaving the climate on to maintain a cabin temp of 21c vs leaving it off.I gather you are assuming a situation in which the ambient temperature is below the thermostat temperature. I have been assuming we were discussing trying to cool the cabin with AC.
On one hand; it will use less energy if left on. On the other; it could possibly cool down the car quicker and more efficiently.
Cycle the compressor? That sounds positively last-century. These days I'd have thought the "intelligent" inverter-controlled compressor would just slow down such that the outgoing airstream was at the required temperature.I've worked on the aircon in my last 8 ICE cars (all European). Although I acknowledge that one COULD use the heater in this way and maybe early Teslas did this, it sounds rather inefficient. None of mine has used the heater in this way. To maintain temperatures less than ambient, they have always cycled the compressor on and off as required. Thermal mass in the system (incl Evaporator) ensured that you did not experience wild fluctuations in temperature
There is definitely a humidity sensor in the cabin because I had to get it replaced under warranty!Dunno whether there's a humidity sensor in the car somewhere. Does it ever attempt to "defog" the windscreen automatically?
Will try to run a similar test, if not the same when I get my hands on the new car. I will keep you posted/reach out to you when I have some free time and suitable weather.I think think there is a humidity sensor indeed - but I don't have it on my current CAN signals decoding list.
Would indeed be interesting to figure out the difference in energy use to the heat pump models. Does anyone else in this thread with a heat pump model have the ability to extract CAN bus data? And knows which signals to decode for heater/AC compressor energy consumption?