Friday, March 29th, 2013 AT 4:22 PM
I have a V8 5.0L engine in a 99 ford explorer AWD, the heater control valve was broken. I live in a place with tropical weater, so my urgent need is to have colder air. Can I instal a manual valve instead of the broken original vacuum operated one? Would it affect the engine's temperature if the manual valve is set to the closed position. I have not found the replacement valve in my country.