air heater noise

[rbertalan]

Are the air heaters that come on before starting suppose to make a wining noise?



I only hear it the first time I go to start the truck and never hear it again.



Or is there something wrong with my set up?



It fires right up.





... Robert...

 

[farmall]

What you hear is normal. There is just a lot of current flowing thorugh those leads and relays. Bill

 

[JFitzgerald]

Yeah, mine whines a little too.