The Resideo L4081A1023/U is a multi-function aquastat controller that regulates boiler water temperature using a single immersion liquid-filled sensing element and two independent SPST snap switches. It provides a fixed 10°F high limit and a 10°F to 25°F adjustable low limit with differential control, mounts without leveling, and includes push-in terminals. Electrical ratings include 0.25 A (0.25–12 VAC) and 8A at 120 VAC; UL and CSA listings are provided.
Immersion-type liquid-filled sensing element with two independent SPST snap switches (high limit and low limit/circulator)
High limit fixed at 10°F; low limit adjustable from 10°F to 25°F with differential adjustment; low limit switch breaks on temperature rise
Electrical rating: 0.25 A @ 0.25–12 VAC; full load 8A @ 120 VAC, 5.1A @ 240 VAC; UL listed and CSA certified; operates in 0–95% RH
Product Highlights
Two SPST snap switches, immersion sensing element, fixed high limit and adjustable low limit; UL and CSA listed.
Product Information
Standard Information
Brand: RESIDEO
Manufacturer Part Number: L4081A1023/U
Country of Origin: Mexico
Technical Specifications
Brand
Resideo
MPN
L4081A1023/U
Part Number
HONE-L4081A1023/U
Application
High and low limit; circulator control
Sensing Element
Immersion-type liquid-filled sensing element
Switches
Two independent SPST snap switches
High Limit
Fixed 10°F
Low Limit
Adjustable 10°F to 25°F with differential adjustment