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V40 Heater Not Working

Hi, I'm having a weird issue with my 2014 Volvo V40 diesel. I've noticed the heater isn't putting out much heat, and the car's thrown an error code. I'm suspecting a defective water valve. My car has almost 198900 km. Could the cable or plug connection be the issue? I am not seeing any visible coolant leaks.

A 2014 Volvo V40 diesel experienced a heater malfunction, suspected to be due to a defective water valve, as indicated by an error code. Despite no visible coolant leaks or engine overheating, the issue was confirmed by a workshop to be a faulty water valve. After replacement, the heater functioned correctly again.

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4 comment(s)

I had a similar problem with my Opel Astra. I suspect the cause to be the water valve or a related component. Was there any sign of engine overheating at any time?

No, there were no signs of engine overheating, at least none that I observed. What was the exact problem with your Astra? Was the error stored in your error memory as well?

Yes, the error was in the memory, and yes, it was also a defective water valve. I would advise visiting a workshop.

Thanks, will do. The workshop confirmed that the water valve was defective. They fixed or replaced it for around 95€. The heating works again as expected.

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VOLVO

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V40