Product Overview

• Simple replacement requires only
a few models to replace multiple
controls used on AO Smith, Bradford
White, and Rheem water heaters.
• Direct purchasing option allows you to
order products straight from Resideo.
• Easily service AO Smith and Bradford
White natural gas water heaters even
if you don’t normally service them.
• Convenient status LED trims repair
time up to 30 minutes.
• Resettable Emergency Temperature
Cuto reduces cost and labor time by
eliminating valve replacement.
• Reduces customer callbacks with
larger pilot ame.
• Accurate temperature sensing
improves comfort and eliminates
scalding risk.
• Smart anti-scaling algorithms protect
children and elderly from water
exceeding the setpoint.
Resideo WT8840 Water Heater Control
Aftermarket
Model
Description Resideo OEM Part Number OEM Part Number
OEM Part NO
Replacements
OEM
WT8840A1000
1" insulation tank,
4" WC setting
WV8840A1000, WV8840A1001
222-47463-01A,
222-47463-01E
415-52907-01 Bradford White
WT8840A1500
2" insulation tank,
4" WC setting
WV8840A1050, WV8840A1051
222-47463-02A,
222-47463-02E
415-52907-02 Bradford White
WT8860A1000
2" insulation tank,
5" WC setting - ULN
WV8860A1009, WV8860A1010 222-48863-01 415-52915-01 Bradford White
WT8840B1000
1" insulation tank,
5" WC setting
WV8840B1042, WV8840B1109,
WV8840B1110
316910-000, 316910-000,
321166-000
100112336,
9007884005
A.O. Smith
WT8840B1500
2" insulation tank,
5" WC setting
WV8840B1059, WV8840B1117,
WV8840B1118
316910-001, 316910-001,
321166-001
100112337,
9007885005
A.O. Smith
WT8860B1000
2" insulation tank,
5" WC setting - ULN
WV8860B1309, WV8860B1310 100073010, 318618-000
100093970,
9007631005
A.O. Smith
WT8840C1000
1.5" insulation tank,
4" WC setting
WV8840C1406 AP16910E SP20832E Rheem
WT8840C1500
2" insulation tank,
4" WC setting
WV8840C1605 AP16910B SP20832B Rheem