Allied Air r40154b011 Limit Control

Product Description

The ALLIED AIR r40154b011 is a furnace limit control designed to monitor and regulate temperature within a residential or light-commercial heating system. Limit controls are safety devices that cut power to the burner when internal temperatures exceed a set threshold, preventing heat exchanger damage and reducing fire risk. This unit is identified by its orange and white label, which aids in quick visual identification during service. Licensed HVAC technicians install and replace limit controls as part of routine furnace maintenance and safety inspections.

This limit control is suited for forced-air gas furnace applications where an OEM-specified safety limit device is required. It is typically found in the supply air plenum or heat exchanger compartment, where it senses temperature rise and triggers a shutoff signal to the burner control circuit. This part is intended for professional installation in residential and light-commercial heating systems.

Key Features

• Safety limit function cuts burner operation when temperature exceeds the rated setpoint
• Orange and white label for fast visual identification during service calls
• OEM part number r40154b011 ensures direct fitment for applicable Allied Air systems
• Designed for integration with standard low-voltage furnace control circuits

Compatibility

Designed as an OEM-style replacement limit control for Allied Air Enterprises forced-air gas furnace systems. Refer to your equipment service manual or Allied Air documentation to confirm fitment for your specific model before installation.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with gas furnace safety controls. Shut off all power to the unit at the disconnect switch and turn off the gas supply before beginning any service work. The limit control is typically mounted in the plenum or on the heat exchanger panel and connects to the low-voltage control circuit. Follow all applicable local codes and manufacturer wiring diagrams when replacing this component.

Technical Specifications

• Manufacturer: Allied Air Enterprises
• Component Type: Limit Control
• Label Color: Orange and White

Standard Information

• Brand: ALLIED AIR
• Manufacturer Part Number: r40154b011