626418R Nordyne Limit Switch L150-20F

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Product Overview

The 626418R Nordyne Limit Switch L150-20F is a direct-fit safety control designed for residential gas-fired furnaces. It monitors heat exchanger temperatures and interrupts the burner circuit if the internal plenum temperature exceeds safe limits, preventing overheating and potential damage.

Key highlights:

• Direct replacement for Nordyne limit switches with L150-20F settings

• Precision temperature cut-out at 150 °F with a 20 °F differential

• Durable black housing engineered for long service life

• Compact footprint with quick-connect terminals for fast installation

Technical Specifications

• Cut-out temperature: 150 °F (± 5 °F)

• Differential temperature: 20 °F (± 3 °F)

• Contact configuration: SPST normally closed

• Electrical rating: 25 A @ 240 VAC resistive load

• Terminal type: 1/4″ quick-connect spade

• Housing material: High-temperature bakelite

• Dimensions: 1.5″ × 1.5″ × 0.75″ (L × W × H)

• Weight: 0.16 lb

Cross-Reference Part Numbers

• Nordyne 626418R

• Neuco L150-20F

• Coleman HVAC L150-20F

• OEM replacement for several Bosch-era furnaces

Compatibility

This limit switch mates with a wide range of single-stage gas furnaces and air handlers. Common compatible brands and series include:

• Nordyne/Coleman Residential Furnaces

• York/Westinghouse Single-Stage Units

• Goodman/Amana Legacy Series

• Bryant/Payne Standard Furnaces

• American Standard Basic Heat Kits

Technician Notes

• Always power down and verify zero voltage before removing the old limit switch.

• Confirm the old switch’s cut-out and differential match L150-20F specs before replacement.

• Mount switch on the plenum in the exact orientation of the original to ensure accurate temperature sensing.

• After installation, cycle the furnace to verify proper burner interruption and reset.

• Keep a spare L150-20F on the truck for quick swaps during service calls.