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TroubleshootingGuide

26|Page

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CLEANINGTHECOMBUSTIONCOMPONENTS

Procedureforcleaningthefan,burner,FlameSensorandAFR,asusedbyallServiceRepresentatives.

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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

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2) POWER

‐Disconnectpowertoyourunitbyeitherunpluggi ngitfromthewalloutlet,orbythecircuit

breaker,dependingonthesetup.

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3) GAS

‐Shutoffthegassupply.

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4) FRONTCOVER

‐Removethefrontcover.

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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.

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Figure25

Figure26

A.O. Smith 110 User Manual

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