Auxiliary Heater Settings: How to Adjust

Hello,

I have a question: Is it possible to adjust the coolant auxiliary heater settings directly through the VAG diagnostic system?
For example, during the winter, leave all three glow plugs activated up to a temperature of 70°C, and during the summer, turn them all off to further reduce energy consumption and ensure that the glow plugs are never actually used.

Regarding the auxiliary heater: /viewtopic.php?t=3091

Hello!
No, you can't just turn that off easily. But yours probably shouldn't be working like that anymore, as it's a heat pump (PD). And to my knowledge, all heat pumps have a PTC auxiliary heater that doesn't heat the coolant but warms the heating air when needed. However, since very little heating is required in summer, it's rarely activated.

Best regards,
Dirk.

I would never say that. In winter, the warm air only starts flowing when the engine temperature is above 40°C, and even then, it takes a long time with the heater on... So, I don't think all PD engines have a pre-heating function. The Climatronic systems in PQ35 vehicles (Golf V, Touran, etc.) do have this feature.

I would have thought that if I can adjust the preheating, I should also be able to adjust the coolant heating.