Emerson 1C21-101 Mechanical Cool Only HVAC Control 12 Pack
A 12-pack of mechanical, mercury-free thermostats for single-stage cooling systems with a 50-90°F range and snap-action contacts
- TypeThermostat, instructions, mounting hardware, Manual, Push Bu
- Size/Dimensions1.29 in x 2.93 in x 3.79 in
- ColorWhite
- Mount TypeWall Mount
- Relay Contactsimple
- Standards/Certificationsnot_capable_emitting_rf_energy
- Compatible with single-stage cooling only systems
- Mercury-free mechanical design eliminates hazardous materials
- Rugged snap-action contacts provide reliable switching
- Fixed heat anticipator maintains consistent temperature control
- 12-pack supplies multiple installations or replacements
12-Pack Mechanical Cool-Only Thermostat
The Emerson 1C21-101 is a low-voltage mechanical thermostat designed for single-stage cooling-only systems. Each unit uses rugged snap-action contacts, a fixed heat anticipator and a bimetal thermometer. The mercury-free design operates across a 50-90 degree F temperature range. This pack contains twelve thermostats with mounting hardware and instructions.
Suits basic cooling control, not heat or multi-stage
Homeowners and contractors needing simple, reliable cooling control for compatible single-stage systems will find this thermostat straightforward to install and operate. Buyers who require heating capability, multi-stage cooling control or programmable scheduling should look at alternative models that support those functions. The mechanical interface offers no digital display or smart-home connectivity.
Mounting hardware and instructions included
Each thermostat ships with the necessary mounting hardware and a printed manual, so installers can complete the job without sourcing separate parts. The bundled instructions guide wiring for low-voltage cool-only circuits. No additional software, batteries or accessories are supplied or required for basic operation.
Highlights
- Compatible with single-stage cooling only systems
- Mercury-free mechanical design eliminates hazardous materials
- Rugged snap-action contacts provide reliable switching
- Fixed heat anticipator maintains consistent temperature control
- 12-pack supplies multiple installations or replacements
Specifications
| Type | Thermostat, instructions, mounting hardware, Manual, Push Button |
|---|---|
| Brand | White-Rodgers, Copeland |
| Model | 1C21-101 |
| Size/Dimensions | 1.29 in x 2.93 in x 3.79 in |
| Color | White |
| Mount Type | Wall Mount |
| Relay Contact | simple |
| Standards/Certifications | not_capable_emitting_rf_energy |
| Item Count | 12 pack |
| Selling Unit | 1, Thermostat, instructions, mounting hardware |
| Features | Air Conditioner, Low Voltage, White-Rodgers |
| Part Number | 01C21 101S1 |
Questions about this item
Do I need a low-voltage single-stage cooling system already installed for this 1C21-101 thermostat to work?
Yes, the 1C21-101 is designed for single-stage cool only systems that use low-voltage wiring.
Will the 1C21-101 thermostat replace an older mercury thermostat on the same two-wire cooling circuit?
This mercury-free mechanical thermostat uses snap-action contacts and a fixed heat anticipator, so it can replace an older mercury unit on a compatible low-voltage cooling circuit.
How can I confirm the 1C21-101 is operating correctly after mounting it on the wall?
Set the dial between 50 and 90 degrees F; the air conditioner should cycle on when the room temperature rises above the set point and shut off once it reaches that temperature.
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