What happens when there is no heat in the car?
In this condition, A/C-cold air and outside air work as they should. Problem is noted when heat fails to deliver on cold days/morning/evening when requested by the driver/passenger. Operator selects heat but gets whatever temperature air is outside. The change over valve, controls how much (hot) coolant should go through the heater core.
Why is my car not running at a constant temp?
This problem could be either an engine thermostat that is not keeping the engine at a constant running temperature (temp gauge steady in the center), or the heater control valve or controls are malfunctioning not allowing engine coolant into the heater core (passenger compartment).
Why does my car heater blow hot and cold?
If i turn it off for about 10 minutes it will blow hot again for again about 10 minutes and then blows cold again out of the defrost vents. If I am running defrost it is basically the same hot for a little while and then cold untill i turn it off for a little bit. My car has 118000 miles. My car has an automatic transmission.
What should the air pressure be in a Mercedes Benz?
With the car off the pressure readings should be about the same as ambient temp. in degrees F. If the outside temp is say 80 degrees F, then the pressures on both gauges should be around 80 psi. If the pressures are ok, the compressor should kick on when a/c is requested. If the compressor does not come on, then there is an electrical concern.
Why is my Mercedes air conditioner not working?
Your Mercedes vehicle will flash a host of service lights to inform you when something might be damaged inside the car. If the air conditioner unit is not running normally or is only blowing out warm air, it may be a temporary fault. Sometimes the unit isn’t actually damaged, and resetting your climate control unit
In this condition, A/C-cold air and outside air work as they should. Problem is noted when heat fails to deliver on cold days/morning/evening when requested by the driver/passenger. Operator selects heat but gets whatever temperature air is outside. The change over valve, controls how much (hot) coolant should go through the heater core.
How do you defrost a Mercedes Benz without cranking the engine?
Insert the key into the Mercedes ignition and turn the ignition cylinder to the “2” position. This is as far as the cylinder will go without cranking the engine. Press and hold the defrost and recirculated air buttons simultaneously.