Videos

The readings indicate that the suction pressure is high, around 152 PSI, with an 80-degree return. The temperature split is only 10 degrees, and the unit is running too warm with low subcooling. When Eric pumps the charge down, he notices that his meter stalls out a bit. Then, he shuts off the blower and […]

Several components hook straight up to the control, including the suction pressure transducer and electronic valves. The control should also be able to read suction pressure, coil temperature, and return air temperatures. Accessory boards can also hold a few connections, such as to more electronic valves and sensors. Eric verifies that all of those boards […]

Before Eric went to work on the motor, it had burned out, was replaced, and burned out again. He also notices insect nests in the panel, the contactor in the supply airstream, a missing keyway, and an oversized breaker, which are all less than ideal. The pulley also cannot spin and is in poor shape […]

Universal components work across all systems, such as modern thermostats; you can see thermostats on gas furnaces, heat pumps, straight-cool A/Cs, and more, and they'll all serve the same purpose. The “Universal” identifier merely indicates a part that works across several systems regardless of OEM. Universal controls aim to be easy for technicians to use […]

The load is the part of an electrical circuit that does something. Examples include motor windings (inductive) and filaments in lightbulbs (resistive). When you run multiple loads in parallel with each other, you connect each side to the power supply. In a series circuit, the loads are connected to each other, not each to the […]

A common belt myth is that you need to tension a belt so that it has an inch of deflection. Many factors can affect deflection, including the pressure you apply to the belt, the belt’s length, and what the belt is made of. There are no hard, fast rules of thumb for working with belts. […]