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Normal operation of AC when Auto mode is enabled and outside temperatures are low has following behavior: - when car is started cold then blower is set to minimum speed - once engine gets heated the controller increases blower speed to intensify heating of the interior because it can blow air now with higher temperature - once temp sensor of interior signals it is warm enough controller decreases blower speed and reduces it to level to maintain temperature that is set All that was working properly, but since some time it started to misbehave and blower speed doesn't get increased when engine warmed-up. I need to either increase the temperature to 26C/78F or increase blower speed manually, and then later on reduce the temp. Pretty much 'Auto' mode is not working as it should, although heater core is delivering warm air. Anyone experienced that and knows how to fix it? I assume it might be interior temperature sensor fault or something connected to it, or maybe some settings? Do you know where temp sensor is located? Thanks!

I was recently facing similar problem. Engine was overheating in stop& drive traffic, on highway it was all good. In stop&go traffic temperature reached 110 Celsius and then fan kicked in and temperature was dropping. After flushing, thermostat and radiator cap I finally found the cause: it was fan resistor. It caused 1st speed of fan not to engage, and waited until temp is high and 2nd fan speed engaged. After replacing temperature is stable. It seems that resistor controls the speed of the fan.

This information is wrong. I bought drain plug of that size and it is too small. I measured original plug and it is M22x1.5. I had to go vent way...

Ok, thanks for clarification.

Thanks for answer! So it's a metric thread... I was focused on inches... It means that Fumoto F105S or F105N (both M20-1.5) should fit. I will give a try then. Do you mean through venting hose? Any special tools required to disconnect it? How did you proceed? :-)

I am also trying to find out what the thread size and pitch is. I found something like that: Fumoto T206N 7/8"-14 UNF Quick Oil Drain Valve ... and I want to replace original drain plug with this drain valve. I am not sure about exact size and pitch of the thread... It would be good to know before draining PTU :-)