Vauxhall Insignia heater only gets hot when using maximum setting

Car: Vauxhall Insignia
Variant: 1.8 SRI
Model Year: 2013

Categories: Electrics, ECU, Warnings & Lights

My heater has all of a sudden stopped working properly, the heat only comes on at max settings and it's not that hot then either

Posted: Apr 4, 2024 (8 months ago)

Paul Hawkins

Points: 1

Could be faulty heater control valve or thermostat sticking open . Check both heater hoses that pass through the bulkhead into heater matrix are hot .

Posted Apr 4, 2024 (8 months ago)

whittingehame

Points: 38,799

If the thermostat is stuck open wouldn't that effect the engine temperature needle as that stays in the normal position all the time?

Posted Apr 4, 2024 (8 months ago)

Paul Hawkins

Points: 1

Yes , the engine would run cooler . If normal temp . can more or less eliminate that

Posted Apr 5, 2024 (8 months ago)

whittingehame

Points: 38,799

Thanks for the replies it's much appreciated, So how big a job is a faulty heater control valve replacement then? Do I need to remortgage the house?

Posted Apr 6, 2024 (8 months ago)

Paul Hawkins

Points: 1

Just check the hoses into the heater matrix are both hot when engine is at operating temp and that will verify if heater valve operating or not . Also check coolant reservoir level .

Posted Apr 6, 2024 (8 months ago)

whittingehame

Points: 38,799

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Vauxhall Insignia heater only gets hot when using maximum setting

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