My 98 impreza L wagon heat cuts off when I have it blowing full blast, when I turn the nob to turn it off and then on again it comes back on. But after a little while it will shut back off. Anyone have any tips on what I can do? Thanks!

the fan cuts off? or, does the fan continue blowing but the temperature is not hot?

 

(why the heater in July ?)

1 minute ago, 1 Lucky Texan said:

the fan cuts off? or, does the fan continue blowing but the temperature is not hot?

 

(why the heater in July ?)

I am trying to fix it if I can for the fall/winter coming up lol. The fan just cuts out all together after a time and wont blow, like goes silent all together. But if I turn it off and then back on it comes back on for a time.

There is a resistor pack in the air box ducting below the passenger glove box. 

It's most likely going open, no voltage to the fan.  Then the circuit closes providing power again.  Easy change 2 screws and a plug.

1 hour ago, lmdew said:

There is a resistor pack in the air box ducting below the passenger glove box. 

It's most likely going open, no voltage to the fan.  Then the circuit closes providing power again.  Easy change 2 screws and a plug.

What exactly am i changing ? I know where it’s at, I’ve actually taken the fan apart before to clean the unit out to see if it helped . 

The resistor pack is about an 1" square and about 2" long.  There is a electrical connector and 2 screws that you will see on the air ducting under the glove box.  Remove the connector and the screws pull it out.  Put the new one in.

The link shows a nice picture on amazon.

https://www.amazon.com/Wells-JA1230-Blower-Motor-Resistor/dp/B000EQO07O/ref=sr_1_3?ie=UTF8&qid=1532083883&sr=8-3&keywords=Subaru+Impreza+fan+resistor

High speed doesn't use the resistors. Probably either a failing blower motor or a relay that can't stay pulled in. 

GD

Yep, I missed he was on High Speed.

I have some spare fans.  $20 shipped