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Black plastic infinite-switch knob, model 40-158

Robertshaw

Robertshaw 40-158 Infinite Switch Knob Black

SKU CH-XFHV-K3JKA

Black plastic infinite-switch knob for thermostat control

  • Product typeLearning Thermostats
  • Direct temperature control via infinite switch
  • Durable black plastic construction
  • Robertshaw 40-158 model compatibility
  • Ready for HVAC thermostat installation

Robertshaw 40-158 Infinite Switch Knob

This black plastic knob is designed for infinite switch controls on Robertshaw thermostats. It carries the model number 40-158 and functions as a direct replacement accessory. The component is supplied new and ready for installation on compatible heating or cooling equipment.

Suits technicians repairing Robertshaw infinite

Buyers who need a different shaft size, colour or material should look at other options. This part is specific to the 40-158 model and will not fit unrelated thermostat brands or switch types.

How it compares

Measured against everything we stock in Thermostats & Thermostat Accessories, at today’s prices. Recalculated every night.

Price $5.99
Cheaper than about 98% of the 286 comparable items (median $78.49).

Specifications

Product
Brand nameROBERTSHAW
Product typeLearning Thermostats

Questions about this item

Which Robertshaw infinite switch models accept the 40-158 knob?

The 40-158 knob is designed for Robertshaw infinite switches with a matching shaft; verify your switch model before ordering.

Will the black 40-158 knob fit older Robertshaw thermostats I already own?

It fits older Robertshaw units that use the same infinite-switch shaft pattern; check the shaft shape on your existing control.

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