Bobrick B-701-138 Sensor Board, Touch Button

The B-701-138 sensor board is supplied for 208/240V service. If the hand dryer or washroom unit you are servicing runs on a different supply voltage, this board is the wrong replacement part, so confirm the voltage stamped on the unit's data plate before you pull it.

It is a replacement component, not a finished fixture. The B-701-138 is the touch button sensor board that goes inside a Bobrick washroom unit. Ordering it gets you the board alone, so the housing, cover, motor, and wiring stay as they are on the unit you are repairing.

A dead or intermittent touch button is the failure this board addresses. The B-701-138 is the touch button sensor board, the circuit that reads the button press and signals the unit to run. If the unit has power at the terminals but nothing happens on a press, the board is the usual suspect. If there is no power at all reaching the unit, look at the breaker and supply wiring first, since a new board will not fix a dead circuit.

Swapping this board means opening a line-voltage washroom unit fed at 208/240V, so it is work for a licensed electrician or a trained maintenance tech, not a general porter. Kill power at the breaker and verify it dead before the cover comes off. For MRO buyers stocking spares, it is a sensible shelf item in facilities running a fleet of the same Bobrick units, since the board fails long before the housing does.