One side of 2015 VW passat gets cold air and the other side hot


Why is my car blowing cold air on one side and hot on the other side?

If you experience the symptom of the AC blowing hot or cold air on one side but not the other and it’s accompanied by a clicking or ticking sound, it probably means a gear in the temperature blend door actuator is faulty and the actuator needs to be replaced.

Why is half my car blowing cold air?

Low Coolant Level

The coolant (usually a mixture of water and antifreeze) in your engine doesn’t just work to keep the engine from overheating: It’s also the source of heat supporting the heating system. If there isn’t enough coolant in your system, the heater core will blow cold air into your car.

Why is heat only on one side?

If those setting are not allowing heat to come to one side of the cabin, the blend doors are likely to blame. These are small doors inside the climate control duct work that are run by small servomotors to control how the air temperature interacts with the cabin.

Why is my car AC blowing hot and cold air?

Failing Expansion Valve – Is your auto’s A/C alternating between blowing cold then hot air? It could be your expansion valve is corroded or failing. This leads to ineffective refrigerant flow-either too restrictive or not restrictive enough. The result is a constant swing from hot to cold air.

How do I know if my blend door actuator is working?

Try blasting cold or hot air and, under normal circumstances, the air should come out according to your controls. If you are trying to blast cold air, but it is coming out hot, even after giving your car a few minutes to adjust, then that is a pretty good indication that you need a new blend door actuator.

How much does it cost to repair a blend door actuator?

The average cost for HVAC blend door actuator replacement is between $309 and $355. Labor costs are estimated between $178 and $225 while parts are priced at $130. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location. Related repairs may also be needed.

How do I know if my heater core is clogged?

This could be due to a clogged or failed heater core, which is responsible for dispensing warm air into the cabin via the blower motor.
Key signs to look out for:

  1. Weak or no airflow.
  2. Cold air (not warm) coming through the vents when the heater is on.
  3. Coolant leakage visible inside the cabin or a damp smell.