Water Heater Pressure Switch Failed Closed

We have a 40 gallon hot water tank model gpvt 40 200.

Water heater pressure switch failed closed.

It is also possible for the switch to get jammed because the switch itself is faulty. Pressure switch failed open. 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. While you are inspecting the control board also check for faulty wiring.

The contacts in the switch are either stuck together or moisture has entered the switched and seized it in the closed position. Pressure change due to blockage so it opens or closes the circuit sending the impulse to the circuit board for further action. 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 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.

The polaris water heater has an onboard diagnostics system that will flash a red led to indicate a fault. The circuit must be closed at all time during the heating cycle. 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. This led is visible through a small window on the access panel near the bottom of the hot water tank.

Step 2 inspect the pressure. Problems with new water heater.