For this evaluation the customers furnace was throwing a high limit switch code and igniter code. I reset the system and the igniter would randomly ignite when the gas valve was opening signifying that igniter is failing and not getting hot enough. Additionally the high limit switch is faulty, the filter is clean and both zones were opened when the furnace was running and the system was not going over 125⁰F. The limit switch will have to be ordered and I will return once it arrives to install it. I recommend installing a float switch to the primary drain line as there is no water safety on the system to prevent flooding in case of a clog within the drain line.