Water Heater Pressure Switch Failed Closed

While you are inspecting the control board also check for faulty wiring.

Water heater pressure switch failed closed.

Pressure change due to blockage so it opens or closes the circuit sending the impulse to the circuit board for further action. The switch is connected to hoses and the water in these can sometimes cause a little bit of a problem. Problems with new water heater. Check the switch for any kind of a mechanical jam.

The pressure switch on a furnace may fail or get stuck in an open position and there are few simple checks you can complete before testing the switch. This led is visible through a small window on the access panel near the bottom of the hot water tank. Pressure switch failed open. The circuit must be closed at all time during the heating cycle.

A pressure switch is designed to sense the negative pressure created by the draft inducer motor during the furnace startup and to shut down the furnace ignition if the air pressure is inadequate. The contacts in the switch are either stuck together or moisture has entered the switched and seized it in the closed position. Step 2 inspect the pressure. The switch activates in response to the pressure ex.

We have a 40 gallon hot water tank model gpvt 40 200. Pressure switch fails closed normally this would indicate a failed pressure switch the furnace will test to make sure the switch is open before starting the ventor motor.