I have a Carrier heat pump/air handler system (looks pretty old) with a honeywell T-stat (looks pretty new) and I am not getting cool air. Heat worked all winter, but I have used it in at least a month. The fan (inside unit, air handler) seems to work fine. The outside unit (compressor and fan) do not come on. I just replaced the filter and the T-stat batteries, and I tried resetting the breakers for the air handler/outdoor unit.
I opened the outdoor unit, and it comes alive when I push the contactor in. If I hold it in for ~10 seconds it will click and stay on after I let go. It sounds like both the compressor and fan are running at this point, but I still get no cooling. Sadly I don't own a multimeter yet. Is there anything else I can check myself, or is it time to call for service?