So in an effort to be a good homeowner and hopefully improve my A/C system's efficiency I decided to clean the condenser coil on my 17 year old 2 speed Lennox A/C unit today. I pulled the disconnect by the unit, remove the fan cover (but not the fan) and used a garden hose to spray the fins from the inside out. When I was done, I put the fan guard back on, popped in the disconnect, and went inside to turn the thermostat down and bask in cooler vent temps...at least that was the plan. I had my handy infrared thermometer and immediately notice the air isn't cool. I go out side and hear the compresor "humming", but the fan isn't running. A glance inside reveals a wire hanging loose - three connections on fan (number, 1, 2, and 3) but only two wires connected - I had obviously knocked one of the fan wires loose. I run back inside, turn up the thermostat, pop the disconnect, remove the fan cover, connect wire, replace fan cover and disconnect and think "That'll do it". Except, it didn't now NOTHING comes on at the condenser unit (i.e. no fan, no compressor, etc.) - note: I could feel the heat coming up from inside the unit when just the compressor was running. Anyway, I've now called a repair tech (no good deed goes unpunished), but I did pop the side cover and saw a pressure switch with a red button. I tried pushing it with the power disconnected, but no change (in order to reset do they need to have power)? I'm assuming some type of thermal or pressure protection has triggered (hopefully I did not burn up a compressor in 5 minutes). Any ideas?