Burner & Rod Assembly - A.O. Smith 110 Troubleshooting Manual

CLEANING THE COMBUSTION COMPONENTS
Procedure for cleaning the fan, burner, Flame Sensor and AFR, as used by all Service Representatives.
1) TOOLS ‐ Gather the following materials together:
a. Degreaser in a pump action bottle, Sandpaper, Philips Screw Driver, Needle‐Nosed Pliers, Duct
Tape, Flashlight, Air Compressor, Shop Vacuum, 3x Towels
2) POWER ‐ Disconnect power to your unit by either unplugging it from the wall outlet, or by the circuit
breaker, depending on the setup.
3) GAS ‐ Shut off the gas supply.
4) FRONT COVER ‐ Remove the front cover.
5) MANIFOLD PLATE/GAS VALVE ASSEMBLY ‐
a. Remove the manifold plate screws. They are wide pan head Philips screws, located on the
edges of the stamped metal plate of the gas manifold
b. Remove the brass gas valve screw.
c. Remove the wire holding the Easy‐Link wires in place.
d. Disconnect the clear plastic tube from beneath the combustion chamber
e. Gently lift up the manifold & gas valve assembly to dislodge it from the gas inlet, and gently let it
hang.
i. There is a small filter screen in the bottom of the gas inlet. Do not lose it.
Figure 25
Figure 26
26|
Page
Troubleshooting Guide