Service Manual

Service Procedure VI

Exhaust Pressure Switch Testing and Replacement

Exhaust Pressure Switch Replacement Procedure

1. Position main power switch to OFF.

2. Loosen adhesive backed rubber escutcheon from service panel access cover

and slide escutcheon back along exhaust pipe to allow for removal of cover.

3. Remove screws from service panel access cover (¼" nut

driver) and remove cover from heater (see images at right).

4. Disconnect silicone tubing and wire leads from pressure

switch (see images at right)

5. Remove pressure switch mounting screws (5/16" wrench)

and remove the pressure switch.

6. Assemble new pressure switch to heater using screws from

Step 5.

7. Reconnect wire leads. Note: Wire leads are interchangeable

with either terminal.

8. Reconnect silicone tubing to pressure switch

as follows:

a. Exhaust pipe tubing connects to

the pressure switch port.

9. Restore 120 volt power supply to water

heater and confirm proper operation

following the lighting instructions on the

lighting instruction label or the lighting

instructions located in the Installation and

Operating Instruction Manual.

10. Reinstall the service panel access cover

and rubber escutcheon.

Attach tubing

here

Rubber

escutcheon

Pressure switch

mounting screw

5/16 hex head

Wire leads

Silicone tubing