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Pressure Switch Testing & Replacement (cont'd)
Step 7.
Using a slotted screwdriver, remove the (2)
screws holding the pressure to the blower junction box. Retain
the screws for later use.
Step 8.
Pull the pressure switch out of the junction box.
Step 9.
Using a multi-meter, check the resistance across
the pressure switch terminals. There should be no electrical
continuity, meaning the switch is open.
Step 10.
If the switch is open, check the pressure switch
tubing and pressure tap on the switch for a blockage. Clear the
blockage if one is present.
Step 11.
If there is not a blockage, replace the pressure switch. Verify the switch
setting of the replacement switch matches the original switch's setting.
Step 12.
Remove both terminals from the pressure switch..
Step 13.
Connect both terminals to the new pressure switch.
Step 14.
Place the pressure switch into the blower junction box.
Step 15.
Align the pressure switch and install the (2) screws removed in Step 7.
Step 16.
Re-install the blower junction box cover.
Step 17.
Re-install the (3) screws removed in Step 4.
Step 18.
Re-install the pressure switch tubing.
Step 19.
Reconnect the cord sets from Step 3.
Step 20.
Plug the water heater into the wall outlet.
Pressure Switch Testing
Pressure switch screws
Pressure switch
Multi-meter leads
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