Thermostat for Resideo T812C1000/U | Mechanical | Low Voltage

Maintain simple, reliable heating control with our replacement for Resideo T812C1000/U Mechanical Thermostat. This classic mercury-free analog thermostat is designed for straightforward control of standard heating systems.

Featuring a snap-action switch and a bimetal temperature sensor, it requires no batteries and provides durable, long-lasting performance. Its simple lever operation makes setting the temperature easy and intuitive.

Key Features & Benefits

• Battery-Free Operation: purely mechanical design works without batteries, ensuring heating control even if batteries would have died.
• Simple Control: Single lever for temperature setting eliminates confusion.
• Mercury Free: Safe, environmentally friendly design uses a snap-action switch instead of mercury.
• Reliable Heating: Compatible with gas, oil, and electric furnaces (Heat Only).
• Economy Model: Cost-effective solution for garages, workshops, and rental properties.

Product Specifications

• Product Type: Replacement Mechanical Thermostat
• Replaces OEM Part #: T812C1000/U (Resideo / Honeywell Home)
• System Application: Heat Only (Low Voltage)
• Display: Analog Scale
• Power Source: System Powered (No Batteries)
• Condition: Brand New

Common Applications

This basic thermostat is used for:

• Warehouses and Utility Rooms
• Garages
• Basic Residential Heating
• Temporary Heat Control

Keep it simple. Order your Replacement Mechanical Heating Thermostat today!

During the checkout process, you can choose from expedited services such as overnight delivery to standard ground shipping. We aim to ensure your order is delivered promptly and reliably, wherever you are.

All returns must be made within 30 days of purchase with the invoice. (After 30 days, Interlight credit only, Minimum 25% restocking fee, no returns after 60 days, special items order just for you are not returnable.)

At Interlight, your satisfaction is our priority. We offer a 30-day money-back guarantee on eligible products, provided they are returned in resalable condition with the original invoice.