HVAC Contracting

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In this troubleshooting situation, the equipment is an air source heat pump and the customer’s complaint is that even though the thermostat is set at 70° F, the temperature in the conditioned space remains near 65°.

Hotel Milano Scala has recently installed a new Mitsubishi Electric filtration system. Fresh air entering the interior spaces is treated in four air handling units — three rated at 5,000 m³/h plus one at 10,000 m³/h for a total air treatment capacity of 25,000 m³/h — composed of a class G4 pre-filter and a class F9 final filter (the same ones used in hospitals to prevent contamination).

Thermostats have gotten seriously smart in the last decade. While they’re a great improvement over traditional thermostats, smart thermostats still cannot affect air distribution across a building to adjust for hot or cold spots, leaving a lot to be desired in terms of making the home a comfortable place.

One common customer complaint about their central HVAC systems is that the a/c system is running but not providing any cool air to the controlled space. One of the most common reasons for this situation is that the a/c condenser or evaporator coil has frozen over. This term or phrase literally means that ice has formed on the heat exchanger, preventing the transfer of heat since the ice is acting as an insulator.

In this troubleshooting situation we have a customer who reports that when they turned on their nine-year-old electric furnace at the beginning of the heating season, they considered that the run cycles may have been excessive.

Yesterday I walked up on one of our managers who was talking to a junior tech diagnosing an intermittent controls issue on a pool heat pump.
In the background, you could hear an extremely loud compressor.