Vokera Air Pressure Switch Closed When Should Be Open

Display shows 41, furnace may attempt to start with fan off or at wrong time

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Stuck air pressure switch contacts, Shorted switch wiring, Incorrect tubing connection

Safety: Turn off power before inspection.

Check tubing connections: Verify that the high and low pressure ports on the switch are connected correctly to the fan or flue hood.
Inspect for water in tubes: Drain any condensate that may be holding the switch closed.
Test switch: Disconnect one tube and see if the code changes after reset. If the switch remains indicated as closed, it is likely stuck and must be replaced.
Replace switch: Fit a new Vokera air pressure switch of the correct rating.

Medium 3/5

Air Pressure Switch

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