Hello, I have a old (I'm guessing an original 30 year old) central air conditioner. I get nothing! I can’t get the inside air handler fan to run either. I have separate heating(boiler) and cooling. Last Fall I installed a Honeywell digital thermostat that worked fine for my boiler and never tried the AC till now. By info I gathered on the internet I was able to depress an armature on the contactor and the outside unit seems to work-compressor tank gets frosty and so does the radiator inside the house.
I have four wires coming from the air handler to the thermostat Red, White, Green and Blue (but the white wire was cut short-not used).
It sounds like I should have 24v at the thermostat but I get 13.6v across the red to blue and the same 13.6v across red to green. I’m in the process of taking apart the air handler in hope that there’s a transformer, fuse or something I can check near the fan. I can see that the red and white 18 gage wires from the outside unit along with the 3 thermostat wires go into the air handler. I threw out the old round mercury t-stat so I can't try hooking it back up. My neighbor said it is probably just low on pressure.
I have posted pictures for identification: http://www.spaceshapeandform.com/?q=node/17
Am I on the right track? If I can just get through this summer I could get a new unit in the fall and save some $$$ hopefully.