Sorry, no it is not possible. Are you sure that it is the heater? Airlocks in the radiator can cause same issues. Common fault. Cylinder head Gasket gone? Check oil for creamy substance. If present your gasket. I updated another couple of questons about same thing (in more detail). Search on Fiat Punto overheating. Good Luck.
how do you change a dashboard bulb in a renault clio?
How do I change Nissan ALMERA DASHBOARD LIGHT BULB
To change the dashboard bulb on a Vauxhall Omega, unscrew the fittings of the dashboard. Twist off the dashboard bulb and replace with new bulb.
Find the dashboard.
How do you change bulb in abs dashboard\
how to change light on dashboard gear for ford escape
how do you prevent or cure a shorting problem with the dashboard clocks
They are broken into smaller pieces or particles, without a change in composition.
you have to remove the cover of the dashboard to replace the light bulbs
You have to take the dashboard off
The repair section on autozone.com explains how to change the light switch.