[pairodice]

Was able to get the Aquahot blower and radiator box out - here is a video… https://youtube.com/shorts/fjMljWe709U?s...C0HKPqcHQd

Here is what Grok said to replace it if needed
Finding a Replacement for Your Fasco 2807-510-108 Blower Motor in Aquahot Systems

Based on the images you provided, this appears to be a 12V DC blower motor (Fasco model 2807-510-108, made in Canada) used in an Aqua-Hot hydronic heating system, commonly found in RVs for furnace or water heater circulation. The motor has a 3-inch diameter body, a ~1-3/8 inch shaft (likely 5/16” diameter), stud mounting, vented housing, and multiple color-coded wires (black, red, yellow, green) for speed control (typically 2-3 speeds). The attached squirrel-cage fan wheel is rusty but reusable if you match the shaft size.
This exact part number (2807-510-108) is an older or OEM-specific variant, so it’s not widely listed for direct sale online—likely discontinued or superseded by Fasco (now under Regal Rexnord). However, you can source it or a compatible replacement through the options below. Focus on motors with these key specs for a drop-in fit:

• Voltage: 12V DC
  
• Diameter: 3 inches
  
• Shaft: 5/16” diameter x 1-3/8” length (double shaft or single with extended end)
  
• Speeds: 2-3 (variable via wiring)
  
• Rotation: Clockwise (CW) from shaft end
  
• Mount: Stud (2-5/16” span)
  
• Wires: 4-5 leads for speed switching
  
• Amps: ~4-9A max (high speed)
  

Recommended Places to Buy

1. eBay (Best for Quick, Affordable Matches)
   Search for “Fasco 2807-510 12V blower motor” to find NOS (new old stock) or used pulls from similar RV/HVAC apps. Expect $50-150.
   
   • Example: FASCO 2807-510-154 A/C 12V Blower Motor – 3-speed, 12V, close specs (3” dia., 5/16” shaft, CW, vented). Users report it as a solid Aqua-Hot/RV substitute. Ships fast, free on many.
     
   • Another: FASCO 2807-510-185 A/C 12V Blower Motor – Similar 3” body, multi-speed, bare leads for easy wiring match. ~$100, free shipping.
     Check seller ratings (aim for 99%+) and ask about shaft/fan compatibility.
     
   
   
2. Specialty RV/HVAC Parts Suppliers (For Exact or Cross-Reference)
   
   • RV Part Shop or Aqua-Hot Authorized Dealers: Contact Aqua-Hot directly (aquahot.com/support or 303-659-8221) for their official replacement kit (~$200-300, includes motor + fan). They often cross to Fasco 2807-510-161 or 2807-513-083.
     
   • MPParts.com: Stocks similar Fasco 12V blowers.
     
     • Fasco 2807-510-161 Blower Motor – 12V, 2-speed, 3” dia., 5/16” x 1-3/8” shaft, CW, stud mount. $120-150, same-day shipping. Customer reviews confirm RV heater fits.
       
     • Fasco 2807-513-083 Blower Motor – 12V, 2-speed, extended shaft for fans, vented. $130, good for Aqua-Hot.
       
     
     
   • Electric Motor Warehouse: Wide Fasco RV stock. Call 800-626-7030 with your specs for a cross (e.g., to 2807-506 series). Prices ~$100-200.
     
   
   
3. Amazon (Convenient but Verify Specs)
   Search “Fasco 12V DC blower motor 3 inch.” Options like FASCO 2807-506-028(~$90) are 12V, 2-speed, 3” dia., reversing, with 5 wires—close match but confirm rotation/shaft. Prime shipping, returns easy.
   
4. Fasco/Regal Rexnord Direct (For Official Confirmation)
   Visit regalrexnord.com/brands/fasco and use their part finder or call 800-825-4328. Provide your label photo—they can supersede to a current model (e.g., D-series 12V blower) and direct to distributors like Johnstone Supply or Grainger. Expect $150+.
   

Tips for Installation

• Wiring: Match colors—black (ground), red (high speed), yellow/green (low/med). Test with a 12V source before full install.
  
• Fan Reuse: Clean/rust-treat the wheel; it should slide onto the new shaft (use set screw or clip).
  
• Compatibility Check: Measure your old shaft exactly. If no exact match, a slight shaft length difference is fixable with adapters (~$5 on Amazon).
  
• Why Replacements Work: These are standard OEM parts for Aqua-Hot (models like 450D), per RV forums and parts cross-references.
  

If none match perfectly, reply with your Aqua-Hot model # (e.g., from the unit plate) for more tailored searches. This should get your heater running again!