Resideo TH1110DV1009 Thermostat

The Resideo TH1110DV1009 is a vertical-mount, non-programmable digital thermostat engineered for straightforward reliability in 1-heat/1-cool conventional systems and heat pumps without auxiliary heat. Designed as the primary Resideo TH1110DV1009 replacement for the PSD010BF, this Pro 1000 series thermostat offers technicians a rugged, cost-effective solution for both residential and light commercial multi-family housing. It supports dual-power operation, allowing for 24VAC hardwired installation via a C-wire or battery-powered configuration, ensuring compatibility with older 2-wire setups and 750mV millivolt systems like floor heaters and fireplaces. The intuitive slide-switch interface for heating, cooling, and fan control eliminates complicated menus, while the backlit display provides high visibility in low-light environments. With a selectable heat temperature range of 40-90°F and precise comfort control, this thermostat maintains consistent setpoints for HVAC single-stage systems while offering a clean, professional aesthetic in Premier White.

• Dual-Power Versatility: Operates on 20-30Vac hardwire or AA batteries, making it compatible with almost any 24V or 750mV heating system.
• Direct Retrofit: Engineered as a high-compatibility HVAC thermostat 1H/1C unit to replace discontinued models like the PSD010BF.
• Precision Control: Maintains temperature accuracy within +/- 1°F to maximize system efficiency and user comfort.
• Contractor-Friendly Design: Vertical orientation and simple terminal designations (R, RC, C, W, Y, G, O, B) streamline the installation process.
• Built-In Compressor Protection: Integrated functionality prevents equipment damage by forcing a delay before restarting the compressor.

Common Questions

Is the TH1110DV1009 compatible with heat pump systems?
Yes, it is compatible with single-stage heat pumps that do not utilize auxiliary or emergency heat. For systems with backup heat strips, a multi-stage thermostat is required.

Can this thermostat be used without a C-wire?
Yes. Because it is dual powered, you can use two AA batteries to power the unit if a common wire is not available at the wall plate.

How do I adjust the heat temperature limits for specific applications?
The installer setup allows you to select between a standard 40-90°F range or a 50-99°F range to suit various heating equipment requirements.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.