larbec

I have a 1997 F150 Extended Cab 5.4 liter

What would cause my heat to be luke warm? I can adjust the dial from cold to hot and when I turn it to hot it never really gets hot ONLY warm no matter how long we ride around for.

What can I check to see what the issue may be? There is not any water on my floor so can I assume it is not the heater coil? Can it be as simple as a fuse?

Thanks in advance

A7X

for the cheap $$ I would replace your thermostat... That's most likely your problem

Papagino

How is the coolant level? If it's low, heat is affected. I know that sounds stupid, but less coolant will flow through the heater coil and thus less heat.

A7X

haha, ^^ I always assume people would check simple things like this first but yeah I guess that's not always the case so yeah papagino's right on for the first place to look for the problem

19905.0-123

Thermostat then heater core more than likely

larbec

coolant level is fine , I will check the thermostat

I thought the thermostat was working fine since the gauge in my dash moved from C to almost the half way mark????

The Ford Kid

My 99 5.4 did the same thing it was the thermostat the gauge in the dash is just an idiot light

larbec

Is the thermostat difficult to change out? I did one way way way back in the 70's and it was pretty much two bolts and a gasket

Do I drain the radiator first or can it be changed full?