Robertshaw 9204H Thermostat

The Robertshaw 9204H Thermostat is a technician-grade 2-wire 24V mechanical control designed specifically for 1-stage heating applications. This horizontal-mount unit serves as a versatile service truck staple, capable of replacing over 50 competitive models. Engineered for reliability in 24VAC gas, electric, and oil systems, it also offers full millivolt compatibility, making it a go-to solution for floor furnaces and wall heaters. The 9204H Robertshaw features a mercury-free, hermetically sealed contact design that eliminates the need for precision leveling during install, significantly reducing time on the job site.

For precise cycle management, the low voltage thermostat includes a heavy-duty adjustable heat anticipator with a wide range of 0.2 to 1.6 amps. This allows for fine-tuning temperature swings to match the specific thermal characteristics of various furnace types. The J-Box compatible base design facilitates direct wall mounting or attachment to a standard junction box without requiring a separate sub-base, streamlining both new installations and retrofits. With a clean white finish and an easy-to-read analog display, this mechanical thermostat provides dependable SPST switching for consistent climate control.

• Universal Compatibility: Replaces dozens of models across 24V and millivolt heating systems.
• Fast Installation: Mercury-free design requires no leveling; J-Box compatible for code-compliant mounting.
• Reliable Heat Anticipation: Adjustable sliding scale allows for precise cycle timing and reduced temperature overshoot.
• Contractor-Grade Durability: Robust SPST switch action ensures long-term performance in residential and light commercial applications.

• Is the Robertshaw 9204H compatible with millivolt systems? Yes, this model is designed to work with both standard 24VAC control circuits and 250-750 millivolt systems like floor furnaces.
• Does this thermostat require a common wire? No, the Robertshaw 9204H is a 2-wire mechanical thermostat that does not require a C-wire or batteries for operation.
• Can I use this for a cooling system? No, the 9204H is specifically for 1-heat applications and does not include cooling terminals or a fan switch.

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.