Electrical

When a powered hangar door starts misbehaving, the cause is usually electrical before it is mechanical. We stock limit switches, power buttons, e-stops, control pendants, SOOW cord, and made-to-order control panels for bifold, hydraulic, and rolling hangar doors. Most of these are inexpensive consumables that cost far less than the damage a failed one causes.

Start here: what the door is doing

A door that stops short is almost never a failed motor. Check the limit switch adjustment before you price an operator.

Which limit switch your door uses

The rotary switch is adjustable across the whole range of travel, which is why it suits a bifold door where the stop point needs fine tuning. A snap-action switch trips at a single fixed point, which works where the travel stop is consistent. If your door has drifted out of adjustment, a rotary switch can usually be reset rather than replaced.

Power buttons and e-stops are not interchangeable

Normally open means the circuit flows freely and pressing the button completes it to drive the door. Normally closed means the circuit is complete until you press it, at which point everything shuts off. Putting a normally open button in an e-stop position defeats the safety function entirely, so check the circuit type and not just the color when you replace one.

Festoon cable and control pendants

SOOW cord carries power to components that travel with the door. It attaches to a steel cable through a festoon cable trolley, sold separately, so the cord follows the door through its full travel without dragging or binding. Control pendants give you up, down, and emergency stop from a single handheld station, typically wired to a motorized operator on a rolling door. If you need a control panel built to your door’s configuration, we make those to order.

Hangar door electrical parts: common questions