Skoda Roomster Heating Issues

Low heating output and an error code certainly point towards a problem with the water valve. The heater core acts like a small radiator; if the valve isn't opening properly, coolant flow is restricted, hence the poor heating. Given the error code, I would check the valve's electrical connector first for corrosion or loose wires. Do you have the exact error code available? Knowing that would help narrow things down. Have you tested the voltage at the connector?

Thanks for the quick reply! I haven't checked the voltage yet. Where exactly should I be testing for that? And what would be a 'normal' voltage reading in that case? Is it possible the valve itself is just stuck, like a valve blockage?

Without the specific error code, it's difficult to pinpoint definitively. However, a faulty water valve aligns with your symptoms and the stored error. Testing voltage at the connector requires a multimeter; you're looking for battery voltage, usually around 12V, when the heating system is activated. Regarding a valve blockage, that's possible, but less likely than an electrical fault given the error code. Trying to diagnose electrical issues without proper tools and experience can sometimes create further complications. Considering the relatively low repair cost of 95€, it might be more prudent to take it to a workshop for proper diagnosis and repair. They can confirm if it's truly the valve or a wiring issue feeding it. If you are not familiar with electrical testing it is like poking around in the dark.

Thanks for the insights! Seems like chasing the wiring myself might lead to more problems. Booked it in at the garage, and you were spot on – faulty water valve, just like you suspected. 95€ all in. Car heating is working great again. Appreciate the help!