Weak heating: thermostat and a blocked cooling circuit
It does not show up on every car. Check before you buy.
cheap repair
severity
not available
mileage
1
sources
1 source next to the write-up.
The fault
How you spot it
The heating warms up slowly or unevenly, and the temperature gauge behaves unusually. The cause is a stuck thermostat or old, deposit laden coolant. The water pump module often leaks as well.
Which model
Who it affects
The card opens the generation, the engine or the transmission.
Generations and models
2 generations.

Volkswagen
I
Golf Sportsvan
Robert Basic from Germany / CC BY-SA 2.0
Volkswagen Golf Sportsvan I
2014–2018
Volkswagen
I.5
Golf Sportsvan
Volkswagen Golf Sportsvan I.5
2018–2020
Checklist
Weak heating: thermostat and a blocked cooling circuit
What you would check for this fault. Take it to the car.
Before you buy
Checklist
What you tick stays on this device only.
Sources
How we know
Information, not an expert opinion
We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.
- A fault on the list does not mean the car you are looking at has it.
- A fault missing from the list does not mean the model is fault-free. Write-ups are made model by model. Not all of them are done.
- You decide whether to buy. This is no substitute for an inspection. That needs a workshop and a history check.