No heat... check engine light...!!

[Baker58]

2008 with no heat, there is a green "wrench" on the dash and the temp gauge goes to over heat (engine reduced power).

After a few more min of driving, wrench light stays on, but truck temp goes down. And still no heat.

But... i can turn on the heat and it will blow hot for about 30 seconds.

When i cut the truck off, the code resets.

Im new to powerstroke.org and need some help.

thanks in advance!!

Also the thermostat was changed today. Problem still going on.

[SchismX]

Get those codes pulled.

[sinner6.0L]

Possible thermostat issue which will set a wrench light on the newest calibrations.

Get those codes pulled asap and keep an eye on your coolant level until then

[Baker58]

When I get the codes read... It says no codes found.

[Baker58]

Is it possible it's a heater core?

[StagNW]

Pids will need to be monitored by the dealer on a test drive to prove thermostat variation.

[Baker58]

got two codes...

P012F and P0297.

whats this mean guys...

[Baker58]

Guess no one knows haha.

[JUGERNAUT]

Originally Posted by Baker58

Guess no one knows haha.

I had 5 of these like this p012f is a ect/eot correlation code this means your oil cooler is clogged or either your ect or eot sensors are biased, you say you have no heat! either the heater core is blocked and is it is its blocked with the same crap that blocked your oil cooler or your blend door motor is bad! feel your heater core hoses if one is hot and the other is cold then your core is blocked! I would also think is all that is good you may have a bas water pump!!

the P0297 is a vehicle overspeed!!! SLOWDOWN lol

[Baker58]

Thanks man

I have had the thermostats replaced. Now the engine does not overheat.

I have to get a oil temp sensor replaced on tue now.

The truck does have heat now... At times. It gets real hot... Ten seconds later its cold again. It's like the heat only works when I'm on the gas. When I'm off the gas... Cold again.

It's weird to me"