Responding to a Dutch customer's inquiry about car coolant：Het koelvloeistof lampje brand altijd even blauw als ik de aotostart en ga rijden. Kan dat kwaad.
No, this is completely normal and not harmful.
Why Does the Coolant Light Turn Blue?
The blue coolant temperature light appears when you start the car because the engine is still cold.
It usually turns off after a few minutes as the engine warms up.
When Should You Be Concerned?
🚨 If the blue light stays on for a very long time → Your engine may be taking too long to warm up. This could indicate a faulty thermostat that is stuck open.
🚨 If the blue light turns red → This means the engine is overheating, which could be due to low coolant levels, a faulty water pump, or a radiator issue.
✅ Solution:
If the blue light disappears after a few minutes, everything is fine.
If it stays on for too long, check your coolant level and have the thermostat inspected.
