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Robertshaw thermostat with 48 inch capillary tube and sensing bulb

Robertshaw

Robertshaw 5300-027 KA-604-48 Thermostat 48 in

SKU CH-8REQ-TAX6C

Electric thermostat with 48 in capillary tube for 5300 series HVAC replacement

  • Product typeLearning Thermostats
  • 48-inch capillary allows flexible placement in HVAC systems
  • Learning thermostat design adapts to temperature patterns automatically
  • 7/8-inch stem length fits standard control panel cut-outs
  • 1/4-inch sensing bulb diameter suits tight installation spaces
  • Compatible with 5300 series and multiple OEM part numbers

Electric thermostat for HVAC systems

The Robertshaw 5300-027 KA-604-48 is a learning thermostat designed as an OEM replacement part. It fits Consolidated Communications, Duke, Johnstone Supply, Robertshaw and Uni-Line equipment using the 5300 Series platform.

Capillary tube and sensing bulb simplify

A 48 in capillary tube connects to a 1/4 in diameter sensing bulb measuring 7 5/8 in long. The 7/8 in stem length aligns with existing mounting points so the unit slides into place without adapter brackets.

Direct cross-reference reduces ordering errors

The part replaces OEM numbers including 12081, 12173, 2081, 23706, 31-02-81, 9991-493, 9991-512, E-226, F16-761, KA-604-24 and KA-604-48. It is not suited for systems requiring a different capillary length or bulb diameter.

How it compares

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

Price $111.99
Pricier than about 66% of the 286 comparable items (median $78.49).

Specifications

Product
Brand nameROBERTSHAW
Product typeLearning Thermostats

Questions about this item

How often should the 48 in capillary tube and 1/4 in sensing bulb be inspected or replaced?

Inspect the capillary tube and sensing bulb during routine HVAC maintenance; replace if kinks, corrosion or bulb damage appear, otherwise they typically last the life of the thermostat.

What temperature limit does the 5300 Series thermostat hit first during continuous operation?

The control cycles at its calibrated set-point; sustained use does not impose a separate thermal ceiling beyond the normal operating range of the 5300 Series.

Does the unit generate noticeable heat or noise when powered all day?

The thermostat is a passive electric control with no fan or compressor; it produces negligible heat and no audible noise during continuous operation.

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