We can all agree that the future we all would have expected for 2020 when we rang in the new year isn't the one we got. We are all worried and looking to hedge our bets or cut our losses in one way or another, which makes sense. Given what we now know, let's look […]

Look closely at a contactor on your truck, and you may find some interesting ratings you never noticed—things like terminal ambient temperature ratings and torque specs. One reading you may overlook is the RES AMPACITY of the contactor or relay. The RES rating is the RESISTIVE LOAD AMPACITY (amperage capacity) or rating. Remember, a contactor and […]

In residential air handler/fan coils, it is common to use a high-voltage interlock between the blower and the electric heat strips to ensure that the blower comes on whenever the heat is on. The problem is that it CANNOT work the other way around where the heat comes on with the blower. Heat strips are […]