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Rectangular white plastic thermostat with terminal screws and temperature dial

Rheem

Rheem SP210245 Upper Thermostat Control 240V 110-170°F

SKU CH-MZAW-YC8KB

Upper thermostat control regulates water temperature from 110 °F to 170 °F at 240 V AC

  • MaterialHAWA
  • Precise temperature control from 110 to 170°F
  • Double-throw thermostat action for reliable switching
  • Operates on standard 240V AC supply
  • Compact 6.25 in by 3.85 in footprint
  • Compatible with MR40245C and MR50245C replacements

Upper Thermostat Control 240V 110-170°F

This Rheem SP210245 thermostat regulates water temperature for compatible sink and fountain systems. It operates on 240V AC power with a control range from 110 to 170 degrees Fahrenheit. The unit uses a double-throw switching mechanism for precise temperature management. It is designed as a direct replacement for specific Rheem equipment.

Verify Voltage Compatibility And Part Numbers

Confirm that your existing system runs on 240V AC before ordering this control. Check the manufacturer part numbers MR40245C and MR50245C against your current thermostat to ensure correct fitment. The Grainger cross-reference numbers 38UN55 and 6E023 provide additional verification points. This item is restricted from sale in California due to Proposition 65 regulations.

Compact Mounting With Standard Dimensions

The thermostat measures 6.25 inches in overall length and 3.85 inches in overall width for straightforward installation in tight enclosures. Its HAWA material construction supports durability in plumbing environments. The double-throw wiring configuration allows reliable switching between heating states. Physical dimensions match the original equipment specifications for direct mounting.

Highlights

  • Precise temperature control from 110 to 170°F
  • Double-throw thermostat action for reliable switching
  • Operates on standard 240V AC supply
  • Compact 6.25 in by 3.85 in footprint
  • Compatible with MR40245C and MR50245C replacements

Specifications

BrandRHEEM
MaterialHAWA

Questions about this item

Does the Rheem SP210245 thermostat include mounting hardware or wiring connectors in the box?

The supplier data lists only the thermostat control itself with no mention of mounting hardware or wiring connectors; plan to supply any required brackets or wire nuts separately.

Should I choose this 240 V AC model or a different voltage version for my water heater?

This unit operates at 240 V AC with a 110-170 °F range; select it only if your heater requires exactly that voltage and temperature span.

What does the 170 °F maximum setting mean for daily hot-water use?

The control can be adjusted up to 170 °F, so the heater will maintain water at that temperature when the dial is turned to its highest position.

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