Immediately de-energize the system to stop the heat generation.
Loose wiring or loose fittings are a leading cause of heat-generating resistance.
Dust buildup or poor placement can prevent the unit from dissipating heat naturally.
In mechanical or hydraulic versions, old or contaminated fluid increases friction, which translates directly into thermal energy.
You don't always need a thermal camera to know your DPHN 142 is in trouble. Watch for these red flags: