karlpeters94

Vauxhall Vectra Heater Output Low

Having trouble with my 2005 Vauxhall Vectra diesel. The heating isn't great, and there's an error stored. My mechanic thinks it's a defective water valve, maybe a bad cable or plug. I'm worried about overheating. Any advice before I get a big bill?

The 2005 Vauxhall Vectra diesel is experiencing low heater output, with an error indicating a potential issue with the water valve circuit. The mechanic suspects a defective water valve, possibly due to a bad cable or plug, which could lead to overheating concerns. Suggested solutions include checking for coolant leaks, ensuring the valve is not blocked, and verifying that it opens and closes correctly. The issue was resolved by replacing the water valve, costing 95€ for parts and labor.

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4 comment(s)

I had a similar problem with my 2012 Peugeot 308. The heater blew cold, and it was a faulty thermostat. The error code pointed to a coolant issue, but we thought the heater core was blocked. Have you checked for coolant leaks? What does the error memory say? Check the valve for blockages or if it opens and closes right.

Thanks! I haven't seen any coolant leaks, but I'll check. I don't know the exact error code, but my mechanic said something about the water valve circuit being open. How did you figure out the thermostat on your Peugeot? Was the error code the same?

The error code was different. But the symptoms were similar: poor heating and a coolant error. My mechanic tested the cooling system and saw the thermostat wasn't opening right, so the engine ran cooler. Since your mechanic suspects the water valve and the error code mentions an open circuit, I'd trust him. Get it diagnosed and fixed at a workshop before it gets worse.

Thanks for sharing! It was the water valve. The repair was 95€, parts and labor. Hopefully, that fixes it.

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VAUXHALL

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VECTRA