Dometic 33128 Atwood RV Furnace Combustion Wheel Kit

Atwood/Dometic 33128 is a combustion-air wheel kit for selected Hydro Flame RV furnaces. It moves air through the burner combustion path; it is not the separate cabin-air blower wheel. Atwood's service parts tables identify this exact part for specified 8500 and 8900 furnace configurations.

Part details

• Exact manufacturer part number: 33128
• Component: Combustion wheel kit, plastic as identified in Atwood's earlier service-parts reference
• Manufacturer chart references: 85-III (16-20, 25, 31-35), 89-III DC and AC, plus 2540 two-stage configurations
• Additional manufacturer chart families: Selected 8500-IV/LD and 8900 AC/DC/LD variations
• Condition: New
• Marine use: No, per the existing supplier listing

Previously listed model references — verify exact variant

The prior supplier listing also named the following models. They are retained for reference, but the manufacturer tables reviewed do not establish universal fit for every listed AF-series revision:

• AFS and AFSA reference models: AFSAD12111, AFSD12111, AFSD16111, AFSD20111, AFSDA12121, AFSD12121, AFSD16121, AFSD20121, AFSAD12131, AFSD12131, AFSD16131, AFSD20131, AFSAD12141, AFSD12141, AFSD16141, AFSD20141
• AFMD reference models: AFMD16111, AFMD20111, AFMD25111, AFMD30111, AFMD35111, AFMD16121, AFMD20121, AFMD25121, AFMD30121, AFMD35121, AFMD16131, AFMD20131, AFMD25131, AFMD30131, AFMD35131, AFMD16141, AFMD20141, AFMD25141, AFMD30141, AFMD35141, AFMD16151, AFMD20151, AFMD25151, AFMD30151, AFMD35151
• 85-IV references: 8516-IV, 8520-IV, 8525-IV, 8531-IV, 8535-IV

Match your furnace's complete model and serial number, motor shaft and original wheel before ordering. Atwood service charts show different combustion wheels for some older 7900/8000 configurations, including part 33124; do not interchange wheel families based on appearance. A qualified RV furnace technician should inspect burner airflow and wheel clearance when servicing the combustion assembly.