AC doesn't work, I check the power to condenser and blower unit and those are OK. Will it cause by transfomer?
In the beginning my ac was working fine except not cool enough so I check the evaporator inside and I found it only half cool and half not cool. So I doubt that I might connect the wire to my thermostat wrong, cause there's a blue wire(connect to common from board) I connected to my thermostat's. After that the condenser unit stop working first. And now the inside unit doesn't work as well. Can someone help? Thank you!

Look see if you have a fuse automotive type normally 3 amp,in the circuit board of the furnace,, if not one or it checks OK,, check the ourput side of the transformer ?with door button pushed in ,for 24 volts,

You made a comment about connecting a blue wire, have you been messing with the tstat or wireing to the tstat? If so you may have fried the transformer

Let us know what you find

I have a lennox air conditioner HS26 series 3 ton. I have had trouble with the unit out side running. I had to replace the condenser, fuses and breaker. Worked great for two months. Now the unit won't run outside again. I had this problem off and on. When the unit cools down the unit outside will start up again. What could be wrong. .