What would cause this? Bad thermostat?

 

Does it still seem like the cable is connected to the dial? That would probably be the most common issue on the Evo for something like this.

 

Not trying to insult but have you checked your fuses? Start simple.

 

Does your engine still run at normal operating temperature?

 

Yes it feels connected. Fuse? The motor blows just not hot. Yes normal temp

 

That's really odd that it wouldn't be blowing hot.

The only thing that would cause that would be a leak (which presumably you'd notice pretty quickly), a blockage (again... I'd suspect you'd notice this), or the cable connecting the dial at either end to have snapped, which is fairly common. When I say dial, I mean the temp dial AND the air selector dial.

It could be stuck in a weird position. But you're getting "normal" air yes? Also, your AC work?

 

Yes getting normal air and no leaks

 

The I would pull the front plate off your dash and verify that the cable is connected properly.

It can really only be one of those things.

I mean silly question, but you're saying the car isn't blowing hot air after it's warmed up right? Also... you're in Miami? The heat should be blowing fine down there I'd imagine.

 

This thread, though dealing mostly with AC, could prove useful.

https://www.evolutionm.net/forums/ev...ega-guide.html

 

Are you sure the coolant hose did not bypass the heater core? :}

 

Yeah, most likely the thermostat. Anyway, a thermostat swap is an easy place to start the investigation.

 

Got it fixed. Line wasnt connected to gear

 

FYI. I'd be very gentle with that knob now... usually once it pops, it comes loose easier and easier.

Good work tho...

 

How do you fix it? I just got a evo 8 this weekend and my ac works fine but heat doesnt even turn on.

 

Ryan... welcome.

I would suggest finding the service manuals if you're not familiar with how the dash comes apart, or search for a how to (might be on here?).

Basically, you pop the CF piece out, pull the knobs off, pull the surround out, find the hidden bolts, and you can expose the cable that way.

It's very easy to do honestly if you're familiar with interior disassembly... but no one likes making a very minor mistake which (on interiors) yield significant interior flaws.