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Resideo L4006H1004 M/R High Limit Aquastat Controller 100°-240°F

Rating:
5 5 2
2  Reviews Add Your Review
Special Price $265.14 Regular Price $294.31
In stock
SKU
L4006H1004
The Resideo L4006H1004 High Limit Aquastat Controller is a stable part that will help to control hot water and hydronic heating systems safely. This controller serves as a high-limit safety device that controls the temperature within a range of 100°F-240°F. It is helpful since the power supply is discontinued as soon as temperatures go beyond the set boundaries thus avoiding harm to the heating system. Its high heat capacity and accurate temperature stability make it an indispensable part of assuring the efficiency and safety of hot water and hydronic heating systems.
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HVAC Controls & Electrical, Control Boards & Modules
Manufacturer:
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Specifications

  • Application: High Limit Control
  • Temperature Range: 100°F-240°F
  • Compatible With: Hot Water, Hydronic Heating Systems
  • Height: 5.63"
  • Length: 2"
Manufacturer Name: Resideo
Product Number: L4006H1004
OEM Part Number: L4006H1004
Product Description: 100-240 Strap-On Manual Reset
Weight:1.35lbs/612.35g

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Product Questions (2)
Customer Questions
What maintenance is required for the Resideo L4006H1004 High Limit Aquastat Controller?

Inspect the aquastat controller sensing bulb and immersion well for proper placement and secure contact to ensure accurate temperature sensing. Check electrical terminals for tight, corrosion-free connections to maintain accurate circuit switching.

What are common issues with the Resideo L4006H1004 High Limit Aquastat Controller?

  • Sensor failure or inaccurate temperature readings.
  • Relay contacts sticking causing continuous heating or shutdown.
  • Loose or damaged wiring leading to intermittent operation.
  • Incorrect setpoint calibration resulting in improper cut-off control.

Installation Steps

Step 1: Turn off power and shut down water system, verify no voltage.

Step 2: Remove old aquastat controller and mount new aquastat controller in immersion well or strap-on position.

Step 3: Wire according to manufacturer schematic to high-limit terminals.

Step 4: Set desired temperature limit.

Step 5: Restore power, test operation, and confirm safety cutoff works.