Alert light for coolant remains on after water pump replacement

[CrawlerTagz]

At the Volkswagen dealership, I had the water pump and thermostat replaced approximately two weeks ago after a warning light and coolant leak occurred.

After two weeks, I noticed a slight decrease in the coolant level and the activation of an additional coolant light.

Took it in for inspection at the same VW dealership.

According to their findings, there is no indication of coolant leakage or overheating. There may be infrequent activation of the check coolant light, which indicates that trapped air bubbles are causing the coolant leak.

However, I'm wondering if the air bubbles won't be released a few days rather than two weeks following the repair.

Additionally, I was unable to take it to the VW dealer for inspection for two days because the coolant light remained illuminated throughout.

Is it just me, or can the coolant light really remain on for no apparent reason?

Many thanks

[MundeDas]

Their system is quite intricate, so it's certainly doable if it's a diesel.

You need to stop driving with the light on and get some coolant to refill it.

It should remain off after being topped up; if it returns to its original state, it indicates an issue.

[CrawlerTagz]

I have filled up the coolant in my 1.5 evo petrol vehicle, and the warning light is still on.

Do I have engine overheating or coolant loss on my hands when I see the red check coolant light?

[MundeDas]

Coolant level is what it will be for. The temperature gauge will display overheating.

There is a chance that the level sender is malfunctioning.

[Anhartic]

Level and overheating are indicated by the red light.

[CrawlerTagz]

What are your thoughts? Is it conceivable for the warning light to illuminate without any actual overheating or coolant loss, unless the sensor is obviously malfunctioning?

[Anhartic]

If it flashes, it means there's a problem with the dashboard, such as the sensor or wiring in the Corrado VR6 I'm working on.