The heater in my car won't function until the external temperature gauge reads at least 26 degrees. If it reads 25 degrees and under, the heat will not come on. Any ideas?

 

Did I post this in the wrong forum? Why no replies?

 

^^ You posted in the correct Forum.

The problem you describe could have several different causes… anywhere from low coolant to air in the coolant line, thermostat malfunction, auto-heating component failure, etc.

I think you need help from your authorized Nissan dealership on this one.

 

Does the fan not blow or does it just blow cold air?

We need more info.