NHIE Mechanical Practice Exam

When a condensate pump is functioning improperly, the first step is to check the float switch and power supply. The float switch is a critical component that detects the water level in the pan; if the water level is too high, the float switch should activate the pump to remove the excess water. If the float switch is malfunctioning or clogged, it may not trigger the pump correctly, leading to overflow or pump failure.

Additionally, inspecting the power supply is important to ensure that the pump is receiving the necessary voltage to operate. A breakdown or interruption in the power supply can prevent the pump from starting or running optimally. This kind of troubleshooting is essential to determine if simple maintenance or repairs can restore functionality without needing extensive or costly measures.

In contrast, replacing the entire AC unit is an extreme and often unnecessary response to a problem that may be resolved through more straightforward evaluation and repair of the components involved. Insulating the condensate lines might prevent condensation or heat loss but does not directly address pump function issues. Increasing water flow may exacerbate the problem, leading to more overflow instead of resolving the malfunction.