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Marty
Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 53312
Experience:  Bosch Certified Master Tech. Over 35 years experience.
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230 kompressor: climate control..it blows 40 degree cold air..wheels

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1999 c-230 kompressor when climate control is set for heat it blows 40 degree cold air rather than 130 hot air, blower works fine, when the control wheels are moved to the max for heat then it makes real hot air any other position it seems to be on AC, also noticed at the same time the car seems to run around 210 c degrees rather than 175 any ideas?

eurotec :

Hi, it sounds like you may have a fault with one of the temperature sensors in the climate control system is unable to regulate the temperature. When you dial the temperature to maximum it overrides the sensors. I would suggest that you have the car connected to the Mercedes Star Diagnosis tester to read out the fault memory of the system and to check the actual values of the sensor. Most likely you will find a sensor giving an illogical reading.

Customer:

will a regular obd scanner find the code and what's up with the marked rise in engine temp related?

eurotec :

No, you will need a factory level tool that can read faults and actual values in the climate control system. Is the temperature running hot all of the time or only at idle?

Customer:

all the time but it started at the same time as the loss of heat

eurotec :

I'd first check the coolant level and then replace the engine thermostat.

Customer:

okay, level already check and full, heater worked fine this am and temp was normal, seems more than a coincidence that both started at once; where do I have to go to find that level/type of tester

eurotec :

Any Mercedes specialist will have a factory level scan tool.

eurotec :

Either the dealer or an independent who specializes in Mercedes repairs.

Customer:

thanks, XXXXX XXXXX u would say that have done all my own work since my 59 190sl but the newer cars control systems are a bit beyond me now [back to my 67 AH 3000]

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