Water Heater Pressure Switch Failed Closed

The switch activates in response to the pressure ex.

Water heater pressure switch failed closed. The contacts in the switch are either stuck together or moisture has entered the switched and seized it in the closed position. I recently moved into a newly built home and we ve been running into some issues with the hot water and a few other things. Problems with new water heater. This led is visible through a small window on the access panel near the bottom of the hot water tank.

The switch is connected to hoses and the water in these can sometimes cause a little bit of a problem. It is also possible for the switch to get jammed because the switch itself is faulty. The polaris water heater has an onboard diagnostics system that will flash a red led to indicate a fault. 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.

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. Check the switch for any kind of a mechanical jam. Pressure switch failed open. Pressure change due to blockage so it opens or closes the circuit sending the impulse to the circuit board for further action.

The circuit must be closed at all time during the heating cycle. We have a 40 gallon hot water tank model gpvt 40 200.