In this month’s troubleshooting situation, we’re taking you to a school, but not to the equipment room of the main building. Instead, it’s a modular classroom (similar to a double-wide manufactured home) that is brand new, and employs a heating/cooling unit that mounts on one end of the building. This system employs heating elements for the heating mode and a direct expansion system for cooling. The complaint is that there is “very little cooling” being accomplished.
Upon your arrival, you determine that the complaint would have been better stated as “blowing warm air” since only the indoor fan motor is running and the compressor and outdoor fan motor are not. Details on the thermostat settings are as follows: