The MGF Register Forums

This sounds more likely to be a sender issue and because of the difficulty of accessing the thermostat with consequent system bleeding, I would start by replacing the sender. They are cheap and more easily accessed without the need for bleeding. You don't need to throw the old one away unless the p...

Hi any help is welcome my temp gauge has started to play up and I would like to try to diagnose if it is the sender or the thermostat etc, temp gauge go up to normal heater working fine, as you drive gauge drops down two notches on gauge if you stop it climbs back to normal. It used to go up to norm...