My air conditioner is running cold and hot. It blows cold air for a while then it blows hot air then cold air etc. Any ideas? Cold is very cold and hot has no cold. Only thing I can think of is a bad thermostat.

Could be low gas

Or the clutch is not engaging ... Some have shims in them that can be removed .
http://www.subaruforester.org/vbulletin ... ch-116835/

Could also be a dicky tx valve. Bram will certainly have a qualified view on likely causes.

The Gen 3 Forester uses six rivets on the clutch so there are no threaded bolt holes. Remove the centre bolt holding the clutch on and prise it off squarely with two screwdrivers. Discard the two shims leaving the washer in place and screw it back on using a longer bolt before screwing the original bolt in. Run the air conditioner to check that the clutch engages/disengages when it is turned on/off.

Details: DIY replace AC compressor clutch broken spring - 2008 STI and cam99's post above.

Removed the shims in the clutch, regassed it and replaced cabin filter. It is still blowing cold and hot.

I'm starting to think it has something to do with the radiator. How to: Adjust A/C Compressor Clutch Post #112 (from cam99 above) or the condenser in front of the radiator.

I've removed the radiator and cleaned it and the condenser. Clutch is still turning off ... then back on eventually.

Anyone knowledgeable on these things?

Could be freezing up.

Have you checked with the hood up that the clutch is engaging properly??

I’m having same issues with mine but only on really hot days.
Most posts iv found else where are pointed to dodgy clutch

The heater tap valve may be partially open. It use to happen with the commodores all the time. We changed the badge and it fixed the problem straight away.