Service Manual

PV SERVICE PROCEDURE III

Pressure Switch Testing and Replacement

PV Series

Pressure Switch Replacement

Step 1. Position gas control power

switch to “OFF” position.

Step 2. Remove the three screws

(Phillip’s screw driver) from

control access cover on blower

assembly and remove cover

(see photo 3).

Step 3. Remove pressure switch from blower housing by removing the two T10

screws (see photo 4a). If it does not have 2 screws, carefully remove it from

the housing (see photo 4b).

Step 4. Disconnect tubing from pressure switch (see photo 5).

Step 5. Disconnect yellow wires from pressure switch (see photo 6).

Step 6. Reconnect yellow 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 (see photo 4b).

Step 9. Position gas control power switch to “ON” position and verify proper heater

operation.

Step 10. Replace control access cover from step 2.

WARNING

115 volt potential exposure. Use

caution to avoid personal injury.