My landlord recently hired someone to install a common wire from my Goodman AC unit on the roof down to where the thermostat is. The current thermostat works fine, but is non programmable and battery powered. My landlord got an ecobee 3 lite to replace it but when I began to install it, I noticed the voltages on the wires were kinda off. R to G is 14.7 Vac but C to G is 59.7 Vac when the ac fan is running and 53 Vac when it is off! Did the handyman screw up installing the C wire or is there something wrong with the transformer on the AC unit?