PDX Series
PDX SERVICE PROCEDURE III
Pressure Switch Testing and
Replacement
Exhaust Pressure Switch
Replacement
Step 1. Position gas control power switch to “OFF” position.
WARNING
120 volt potential exposure. Use caution
to avoid personal injury.
Step 2. Remove the three screws (Phillips screw driver) from control access cover on blower assembly and remove cover (see photo 3).
4
Step 3. Carefully remove pressure switch from blower housing (see photo 4)
Pressure Switch
5
Slide pressure switch in direction of arrow while tilting slightly away from blower housing.
6 | 7 |
Step 4. Disconnect tubing from pressure switch.
(see photo 5)
Step 5. Disconnect yellow wires from pressure switch (see photo 6)
Step 6. Reconnect wires from step 5 to new pressure switch.
Step 7. Reconnect tubing to new pressure switch.
Step 8. Carefully position pressure switch into blower housing.
Step 9. Position gas control power switch to “ON” position and verify proper heater operation.
Step 10. Replace control access cover from step 2.
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