A/C stops working when idling...need some help.
The air conditioning in my ‘13 STI is acting up...it blows hard and cold when driving but after sitting in standstill traffic in 90 degree weather for an hour or so, it starts to have problems. It blows hot air, and the engine constantly dips slightly below idle speeds and then revs itself up to around 1500 and then repeats every few seconds. It drives perfectly normally during this issue. Once I get out of traffic and start driving again, it blows cold and stops the weird revving issue when idling. Any idea what could be the cause?