Have a Car Question? Ask a Mechanic Online.
Hi I'm Kevin this is very unlikely to be the cause it's just an option for different engine variants using the same fuse box . When running car what does it do ? Run car up and let me know first if heater gets hot in car? Then if you touch radiator hoses carefully do they both get hot top and bottom hose? If they are all hot and heater is also does fan cut in at all ?
Do you still require help?