After the engine is warmed up, while sitting idling with heater on, my heater will start to blow cold air as my temp gauge starts to rise. Just as the gauge is about to hit the red, I'll hear a weird sound under the dash, the gauge will quickly return to normal, followed by a blast of hot air from the vents (with heater turned on). The sound under the dash sounds mechanical, but also kind of like a rodent trying to escape the dash.
I've parked and seen it cycle like this about every 5 minutes. Heater running fine, cold air, temp spike, weird sound, back to normal.
This may happen while I'm driving, but I haven't seen or noticed it.
Everything else seems to function fine. Until today when it won't start (starter turns, but engine won't fire). I can't imagine how that could be related, but I'm just starting to explore this new issue.
I've parked and seen it cycle like this about every 5 minutes. Heater running fine, cold air, temp spike, weird sound, back to normal.
This may happen while I'm driving, but I haven't seen or noticed it.
Everything else seems to function fine. Until today when it won't start (starter turns, but engine won't fire). I can't imagine how that could be related, but I'm just starting to explore this new issue.