Resideo - Honeywell Home L4006H1004 Aquastat Controller

Resideo - Honeywell Home L4006H1004 Aquastat Controller provides precise boiler and storage-tank temperature control for dependable heating performance. The unit uses a Type 3/8 inch diameter x 2-7/8 inch length copper sensing bulb, a 1-1/2 inch capillary, and a direct horizontal/vertical immersion well for flexible installation in tight spaces. With a sensing range of 100 to 240°F and a maximum temperature rating of 150°F, this aquastat delivers reliable high-limit protection across residential and commercial boilers and storage tanks. UL and CSA approvals ensure safety, reliability, and code compliance in demanding environments.

• Type: SPST, Break on Temperature Rise
• Electrical ratings: 8 A at 120 V AC / 5.1 A at 240 V AC (full load)
• Locked rotor: 48 A at 120 V AC / 30.6 A at 240 V AC
• Millivolt capability: 0.25 A at 0.25–12 V DC
• Connection: 3/4 inch conduit, screw terminal
• Application: Boiler, Storage Tank
• Sensing assembly: copper bulb 3/8" dia x 2-7/8" L; capillary 1-1/2" L; filled with toluene or silicone oil
• Immersion well: direct horizontal/vertical
• Included: factory set at 240°F; heat-conductive compound; bracket for strap-on mounting
• Approvals: UL, CSA
• Dimensions: 2" W x 2-1/8" D x 5-5/8" H
• Pressure ratings: 200 psi (capillary bulb); 255 psi (immersion well)

Designed for reliable boiler control and energy-efficient operation, this aquastat combines rugged construction with straightforward installation and proven performance.