If the unit is electrical, spikes or "dirty power" can cause the internal coils to work overtime, generating excess heat.

If you find your DPHN 142 is running at unsafe temperatures, follow these steps to prevent permanent damage:

Use compressed air to remove any debris from cooling fins or vents. Prevention and Long-Term Maintenance

Immediately de-energize the system to stop the heat generation.

When a DPHN 142 reaches a "hot" state, it is rarely a random occurrence. Usually, one of the following factors is at play:

Dust buildup or poor placement can prevent the unit from dissipating heat naturally.

Loose wiring or loose fittings are a leading cause of heat-generating resistance.