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White Rodgers 1A66-641 Line Voltage Wall Thermostats Catalog

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THERMOST
ATS
LINE VOLTAGE 
THERMOSTATS
1A65-641
1G65-641
1G66-633
LINE VOLTAGE BASEBOARD THERMOSTATS
Electric Heat Thermostats Used for Controlling Baseboards,Cable 
Heat, Glass Panels, etc.
FEATURES
• 1A66 types are a double-pole disconnect model with “OFF” position which
 mechanically breaks both sides of line.
• Classic White or Beige color.
SPECIFICATIONS
Dimensions. . . . . . . . . . . . . . . . . . . . . .   4
1
/
2
”
H x 2
3
/
4
”
W x 1
1
/
4
”
D
Agency . . . . . . . . . . . . . . . . . . . . . . . . .  U.L. listed and C.S.A. certified
PARTS AND ACCESSORIES 
See end of thermostats section for additional parts and accessories
• F75-0176 – for locking or limiting temperatures at 66°, 69°, 72° or 75°F
  Temperatures limit can also be set at 60° or 63°
• Thermostat Guards — see pages 34–35
LINE VOLTAGE BIMETAL WALL THERMOSTATS
Electric Heat Thermostats Used for Controlling Baseboards,Cable 
Heat, Glass Panels, etc.
FEATURES
• 1G66 types are a double-pole disconnect model with “OFF” position which
 mechanically breaks both sides of line.
• Classic white.
SPECIFICATIONS
Dimensions. . . . . . . . . . . . . . . . . . . . . .   4
13
/
16
”
H x 3
5
/
16
”
W x 1
7
/
18
”
D
Agency . . . . . . . . . . . . . . . . . . . . . . . . .  U.L. listed and C.S.A. certified
PARTS AND ACCESSORIES 
See end of thermostats section for additional parts and accessories
• Thermostat Guards — see pages 34–35
Model
Number
Range
Switch 
Action
Load
Resistive
(Non-Inductive)
1A65-641
40 to 85°F (4 to 29°C) 
1.0°F 
Open on Rise
22.0A, 120 VAC (2500W) 
22.0A, 240 VAC (5000W)
18.0A, 277 VAC (5000W)
1A65W-641 
1A66-641
40 to 85°F (4 to 29°C)
1.0°F 
Open on Rise
22.0A, 240 VAC (5000W) 
18.0A, 277 VAC (5000W)
1A66W-641 
➀
 
W in model number denotes Classic White Color
REPLACES HONEYWELL T498A / B SERIES
Model
Number
Range
Switch 
Action
Load
Resistive
(Non-Inductive)
1G65-633
4 to 26°C (40 to 80°F) 
0.5°C 
Open on Rise
22.0A, 120 VAC (2500W) 
22.0A, 240 VAC (5000W)
18.0A, 277 VAC (5000W)
1G65-641
40 to 80°F (4 to 26°C) 
2.0°F 
Open on Rise
22.0A, 120 VAC (2500W) 
22.0A, 240 VAC (5000W)
18.0A, 277 VAC (5000W)
1G66-633
4 to 26°C (40 to 80°F) 
0.5°C 
Open on Rise
22.0A, 240 VAC (5000W) 
18.0A, 277 VAC (5000W)
1G66-641
40 to 80°F (4 to 26°C)
2.0°F 
Open on Rise
22.0A, 240 VAC (5000W) 
18.0A, 277 VAC (5000W)
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