No heat on high?

[Grandprixpaul]

Car used to blow scalding heat but now im not getting heat on high heat after car sat for while and a engine swap help

 

[burgundy83]

Do you mean that the blower motor isn't blowing when you switch it to hi? If that's the case, it's a shitty resistor, they're in the heater box right by the fan. If you mean just temp-wise, it'll be a problem with your heater core or the valve most likely.

 

[Intragration]

Also don't forget that power for the blower high setting comes directly from the power terminal on the starter. The dashboard switch activates a relay by the blower motor, and this relay gets power from the starter and provides it directly to the blower motor. The connector between the relay and the starter has been known to melt.

 

[FE3X CLONE]

Look for the large red wire on the passenger side of the engine compartment.

If you just performed an engine swap then you likely forgot to plug this wire back in. It's the most common reason (after an engine swap anyway) that the high fan setting doesn't work.

 

[tc1959]

The resistor is for the lower speeds,The Fan relay controls the high speed. Check for burnt terminals in the relay connector,and for power on the red wire to the relay.

 

[burgundy83]

The resistor is for the lower speeds

yup, my bad

 

[Evan11]

Look for the large red wire on the passenger side of the engine compartment.

If you just performed an engine swap then you likely forgot to plug this wire back in. It's the most common reason (after an engine swap anyway) that the high fan setting doesn't work.

doesnt anyone have a pic of this wire..like an under hood shot? mines been the same way for about 4 yrs.

 

[Grandprixpaul]

Thanks guys for all the idea's ill been going over them all and keeping you guys posted on what the problem is ,thanks