Where are the pintle valves on a Mercedes W210 heater?
What you should see are the two pintle valves inside the bottom half of the Duovalve. In our case, you can see where the shaft of the left valve has broken off (green arrow), leaving the valve cocked in place and the heater blowing hot all the time on one side of the car.
Why is my W210 heater control valve not working?
Additionally the inside of the two coils can become blocked with corrosion from the engine coolant, preventing the valves from closing. In both cases, you would get hot air blowing from one or both of the vents at the same time. In this article, we will go over the steps involved with disassembling the Duovalve and replacing it, if needed.
Why is the duovalve on my Mercedes W210 not working?
In this case, you would get hot air blowing from one or both of the vents at the same time. The Duovalve can also fail when the small pintle shafts break inside the bottom housing. When this happens, the valve can stick open.
How does the climate control work on a Mercedes W210?
The climate control system on the W210 Chassis Mercedes has a dual climate system. What this means is that one side of the car can be cool, while the other side blows warm air and vice-versa. The Duovalve is used to regulate the amount of engine coolant that flows into the heater core between both sides of the passenger compartment.
Additionally the inside of the two coils can become blocked with corrosion from the engine coolant, preventing the valves from closing. In both cases, you would get hot air blowing from one or both of the vents at the same time. In this article, we will go over the steps involved with disassembling the Duovalve and replacing it, if needed.
What you should see are the two pintle valves inside the bottom half of the Duovalve. In our case, you can see where the shaft of the left valve has broken off (green arrow), leaving the valve cocked in place and the heater blowing hot all the time on one side of the car.
In this case, you would get hot air blowing from one or both of the vents at the same time. The Duovalve can also fail when the small pintle shafts break inside the bottom housing. When this happens, the valve can stick open.
The climate control system on the W210 Chassis Mercedes has a dual climate system. What this means is that one side of the car can be cool, while the other side blows warm air and vice-versa. The Duovalve is used to regulate the amount of engine coolant that flows into the heater core between both sides of the passenger compartment.
Can a car vent blow cold one side and hot the other?
In a vehicle with dual temperature controls you may encounter a situation where the vent blows cold one side, hot on other side or vice versa.
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.