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vincentsteel8

Spark minimal heater output

I'm experiencing a weird issue with my 2019 Chevrolet Spark (gasoline engine). The heater output is minimal, and I pulled an error code from the ECU. I suspect a faulty water valve, possibly due to a wiring or connector issue. Mileage is 233452 km. Anyone else run into this?

Summary of the thread

A 2019 Chevrolet Spark was experiencing minimal heater output, and an error code suggested a potential issue with the water valve. The problem was suspected to be related to a wiring or connector issue. It was advised to check the valve's resistance against the manufacturer's specifications to determine if the valve was faulty. After replacing the water valve and connections, the heating issue was resolved.

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4 comment(s)

franziskaeule1

Low heat and an error code definitely points to the water valve. Have you checked the valve's resistance and compared it to the manufacturer's spec? Could also be a clogged heater core, but the error code makes me think electrical.

vincentsteel8 (community.author)

I haven't checked the resistance yet, but that's a good call. Where can I find the correct resistance value for the water valve? And if the resistance is within spec, what's the next thing to check before pulling the dash to get at the heater core?

franziskaeule1

The resistance value should be in the service manual, or possibly online forums dedicated to the Spark. If the resistance checks out, but you still have low heat and an error code, it's likely the valve itself is mechanically failing, even if the electrical portion is functional. At this point, a shop visit is probably best to diagnose it properly.

vincentsteel8 (community.author)

Thanks for the advice. Turns out it was the water valve, just like you said. Replaced it and all the connections. Total cost was 95€. Heating is back to normal now.

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CHEVROLET

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SPARK