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The A/C could still be coming on even if you haven't pressed the button - e.g if you have it in Defrost or Auto mode. And the water looks like it's in the correct place for the AC Drain Hose. If you can catch a drip in your hand, and it's cold, then that's confirmation.


A clogged catalytic converter will cause back-pressure in the engine, and cause the engine to run badly - you'd have trouble reaching 35mph with a bad clog, and it wouldn't just be on hills. You've already tested for one head gasket issue - unfortunately, on older Subarus, that's always the first thing to check for! You have no exhaust gas in the coolant, ...

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