Re: What are these switches for?
Reply #6 –
Are you talking about Aquahot heat on to engine when driving?? Why? That has basically a "pre-heat" function. Think of it as a "block heater by a different mother". That would certainly add to the heat load which would both run coolant hotter and cost you MPG and HP as the fan would be on HIGH.
If this is not what you are referring to, please let us know.