Why does my AC blow hot air but not cold air?
The reading for this sensor… sensor 05 for my 1998 C280 was 159 with the car running for 10 min and 158 without starting the car in the morning after a night with outside temp 80. The problem I have is that ac blows hot/warm/outside temp air initially, then it blows cold air for 1 or 2 min then it blows outside air.
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 …
What is the recirculated air button on a Mercedes?
This is as far as the cylinder will go without cranking the engine. Press and hold the defrost and recirculated air buttons simultaneously. The defrost button has three lines going through it, while the recirculated air button has a picture of a car with a curved line through it.
How does the defrost button on a Mercedes work?
The defrost button has three lines going through it, while the recirculated air button has a picture of a car with a curved line through it. Hold these buttons down for about five to 10 seconds, or until the LED lights on both buttons start flashing. Wait 45 to 60 seconds for the LED lights to stop flashing. Then turn off the car.
Why does my Mercedes air conditioner keep blowing hot air?
In many models, the AC keeps blowing hot air even after recharging the coolant. It is a frustrating problem, especially during the summer, when it is almost impossible to drive a car without the AC on. A Mercedes air conditioning reset is a possible solution. Do you know how to do it? Is there any other way to fix the glitch?
Why does my Mercedes air conditioner not reset?
If a Mercedes air condition reset does not work, these following reasons could be causing the trouble: When the AC is releasing hot air, the possible reason could be a defect in the damper. The component is in charge of the air path that goes into the cabin. Check the onboard computer if it can verify the damper’s position.
How to troubleshoot your Mercedes medic air conditioner?
Turn the A/C ON. If you have an Economy button make sure that is off. Make sure fan is on HIGH, temperature selector is turned all the way to COLD, and that the A/C and recirculate light indicators are on. Set the temperature to cold, the lowest setting. Set the cooling fans on high on the climate control.
How does Mercedes Benz air conditioner system work?
While the pictures on this article are of Mercedes Benz cars, this guide is written to apply to all makes and models. How the A/C System Works. A/C compressor not engaging.
The reading for this sensor… sensor 05 for my 1998 C280 was 159 with the car running for 10 min and 158 without starting the car in the morning after a night with outside temp 80. The problem I have is that ac blows hot/warm/outside temp air initially, then it blows cold air for 1 or 2 min then it blows outside air.
How to know if your Mercedes Benz has an AC problem?
Start the car and turn on the AC. (make sure the EC button it off!) Press and hold the REST button for 5 seconds or so. The display will change from your temperature settings to a diagnostic mode The number on the left is the sensor ID and the number on the right is the value. Use the left and right “Auto” buttons to cycle through the sensors.
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.
What should I do if my heater doesn’t get cold?
If it doesn’t get cold then you are most likely low on refrigerant or have another issue. Take it to a shop for a prober diagnosis. The heater core temps should be within a few deg of the evaporator temp. If they are significantly higher, it means your duo valve is probably going bad. Hope this helps.
Why does my air compressor not come on?
If the compressor does not come on, then there is an electrical concern. If the pressures are low,you have a leak, if the pressure is 0psi you probably have a large leak. You will have to suck the system down into a vacuum and see if it holds.
How to troubleshoot your Mercedes Benz air conditioner?
Identify the location of your compressor. Look at the pullyer and you should be able to see if it spining or not. The engine running turn the A/C on max cool, set fans high, and make sure that the clutch is engaging on the compressor. The pulley spins any time the engine is running. The center part of the A/C pulley only engages when the A/C is on.
Why does my air conditioner spin when the engine is running?
The pulley spins any time the engine is running. The center part of the A/C pulley only engages when the A/C is on. If the clutch is engaging and disengaging rapidly, the refrigerant may be low. Locate the Low Pressure A/C recharge port.
What to do if your AC blower is not working?
Disconnect cables to motor and resistor. Remove hose from motor, it should just pull off with little effort. Unscrew motor and resistor. Screw new motor and resistor in. Connect hose to motor. Connect cables to motor and resistor. Turn on car and test AC. Thanks for watching! Loading…
What happens when a central air blower does not start?
The blower motor starts, turning fan blades that circulate cold air from the evaporator coils, through the home’s ductwork and into each room. If the blower motor fails to start, nothing happens. The living spaces gets uncomfortable as the cooling cycle stalls. Most thermostats control both central air and central heat.
How to replace a blower resistor and motor?
Easy video on how to replace blower resistor and motor with 1 screw driver and in about 10min. Remove glove box, pop bottom panel off to gain motor access. Disconnect cables to motor and resistor. Remove hose from motor, it should just pull off with little effort. Unscrew motor and resistor. Screw new motor and resistor in. Connect hose to motor.