Model Number

Description

Used With

Shipping
Weight
(lbs)

ASYSTAT370

Electronic, 1 Heat (Gas)/1 Cool (Non Prog.)

All Cooling/Gas Models

1

ASYSTAT371 ³

Electronic, 1 Heat (Elec.)/1 Cool (Non Prog.)

All Cooling/E.H. Models

1

ASYSTAT380

Electronic, 2 Heat (Gas)/1 Cool (Non Prog.)

AUD/ADD-R Models

1

ASYSTAT570

Electronic, 2 Heat/1 Cool (Non Prog.)

All Heat Pump Models

1

ASYSTAT602

Heating Only With Fan Switch

All Furnaces

1

ASYSTAT603

Cooling Only With Fan Switch

All Cooling Models

1

ASYSTAT604 ²

Heat/Cool Vertical

All Cooling Models

1

ASYSTAT605 ²

Heat/Cool Horizontal

All Cooling Models

1

ASYSTAT606

2-Stage Heat/1-Stage Cool

AUD,ADD-R Furnace Models

1

ASYSTAT610 ¹

1-Stage Heat/1-Stage Cool

All Cooling Models

1

ASYSTAT611 ¹

2-Stage Heat/2-Stage Cool

All Cooling Models

1

ASYSTAT616 ²

Sub-base Auto. Changeover

ASYSTA610,611

1

ASYSTAT617 ³

Sub-base Man. Changeover

ASYSTAT610

1

ASYSTAT620

Prog. Electronic Setback
3-Stage Heat/2-Stage Cool

All Cooling Models

1

ASYSTAT621

Prog. Electronic Setback
1-Stage Heat/Cool

All Cooling Models

1

ASYSTAT622 ²

1-Stage Heat/Cool Programmable

All Cooling Models

1

ASYSTAT625

Humidistat

All Cooling & HP Models

1

ASYSTAT650

Deluxe Auto. Changeover

All Heat Pump Models

1

ASYSTAT651A

Manual Changeover
2-Stage Heat/Cool

All Heat Pump Models

1

ASYSTAT652A

Manual Changeover

All Heat Pump Models

1

ASYSTAT653A

Deluxe, 3 Heat/2 Cool Automatic or Manual changeover

All Heat Pump Models

1

ASYSTAT655A

Manual Changeover
2-Stage Heat/1-Stage Cool

All Heat Pump Models

1

ASYSTAT656

Prog. Electronic Setback

All Heat Pump Models

1

ASYSTAT701A

Prog. 1-Stage Ht/1-Stage Cool

All Cooling Models

1

ASYSTAT702A

Prog. 2-Stage Ht/2-Stage Cool

All Cooling Models

1

ASYSTAT703A

Prog. 3-Stage Ht/2-Stage Cool

All Heat Pump Models

1

ASYSTAT704A

Remote Temperature Sensor

ASYSTAT702A,703A

1

BAY28X190 ⁴

Locking Cover

Room Thermostats

2

BAYMTPL005A

Retrofit Wall Cover Plate Kit for
Programmable Zone Sensors

ASYSTAT701,702,703A

1

BAYSENS024A

Outdoor Temperature Sensor

ASYSTAT701,702,703A

1

BAYSENS026A ⁵

Duct Temperature Sensor

ASYSTAT701,702,703A

1

TAYSTAT250A

Outdoor Thermostat

All Cooling & Heat Pump Models

1

¹ Requires subbase.
² Requires BAY24X042 relay when used with electric heaters.
³ Specially designed for electric heater application (instant on fan).
⁴ Not for use with programmable thermostats.
⁵ BAYSEN026A must be used with ASYSTAT704A