I'm having some troubles with my wrx.
During idle my heater doesn't blow hot air, and my car starts to slowly overheat (114C) if i rev the car to 2.5k rpm the temp drops back down to the normal 1/3 mark. the heat works perfect when driving and the car never overheats (86C)
I checked my coolant and it seems low? The plastic overflow tank is almost empty and the filler tank next to the turbo seems a bit low.
Both of the fans do turn on at idle.
How much coolant should be in tank next to the turbo?
Could this be cause of the heater problem?