Received a call that the furnace was not operating, upon arrival I found that the main control fuse for the furnace was blown. I replaced the fuse with a little popper resettable breaker and cycle the system. The furnace started up and I confirmed that it is operating and heating properly and that the blower motor is working. I switch the unit over to cooling and found that as soon as the time delay went through that the popper blue, upon further investigation I found that the contactor in the condenser has a burnt coil and is causing the fuse to blow. The contacter will need to be replaced. Replaced the failed control, mounted and wired in as necessary. Started up the system in cooling mode and confirmed that the condenser and blower motor for the furnace are now operating and the unit is cooling properly. Switched the thermostat over to heat and confirm that the furnace is also turning on and operating properly.
