Reznor Pressure Switch 30 60615 107

This is a Reznor pressure switch, supplied under part number 30 60615 107 and marked HUBA 604.9 (S3). It is a sensing device used on the Reznor H30107 condensing unit heater, where it monitors air pressure within the appliance's air path and proves the associated condition to the control sequence.

• The appliance fails to fire or drops out during the ignition sequence because the pressure condition is not proved.
• A pressure or fan proving fault is registered and the heater locks out repeatedly.
• Operation is intermittent, with the heater running on some calls for heat and locking out on others.
• The switch does not change state on test when the correct pressure is applied.
• Visible damage, contamination or blocked sensing connections at the switch.

• Confirm the appliance model and serial number against the fitment listed for this part.
• Compare the part number and the HUBA 604.9 (S3) marking on the existing switch before ordering.
• Check the sensing tubes and connections for blockage or leaks, as these can mimic a failed switch.
• Verify the electrical connections and terminal arrangement match those on the unit being repaired.