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White non-programmable thermostat with wall plate

Thermostat Millivolt Heat Only CT33A1009

SKU CH-EKVH-ZJKPD

Millivolt heat-only thermostat with snap-action switch, low-voltage operation and included mounting hardware for simple DIY installation

  • Product typeLow Voltage
  • Product colorWhite
  • Key featuresLow Voltage
  • Millivolt heat-only thermostat for compatible low-voltage systems
  • Snap-action magnetic switch provides reliable heating control
  • No leveling required for quick DIY installation
  • Includes wall plate and mounting hardware
  • Simple manual temperature adjustment with bimetal sensor

Millivolt Heat-Only Thermostat

This non-programmable thermostat controls millivolt heating systems using a snap-action magnetic switch. It is designed for homeowners who want straightforward temperature control without programming or a display. The bimetal sensor provides simple, hassle-free operation for heating-only setups.

Compatibility Check Before Ordering

Verify that your system is a millivolt heat-only configuration before purchasing. This unit is not compatible with electric baseboard heat, heat pump systems, or multi-stage heating and cooling systems. Ensure you do not require auto changeover or cooling functions for your installation.

Installation and System Fit

The thermostat includes mounting hardware and a wall plate for DIY installation with no leveling required. It fits low-voltage millivolt wiring and frees you from complex programming or display navigation. The compact design suits basic heating control needs in residential spaces.

How it compares

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

Price $28.99
Cheaper than about 76% of the 286 comparable items (median $78.49).

Specifications

Product
Brand nameHoneywell Home
Product typeLow Voltage
Product colorWhite

Questions about this item

Does the CT33A1009 thermostat include everything needed for installation or do I need to buy a wall plate separately?

The thermostat comes with mounting hardware and a wall plate included, so no separate purchase is required for installation.

How do I choose between the CT30A, CT31A and CT33A models for my heating system?

The CT33A is the Millivolt heat-only model; the CT30A is heating-only low voltage and the CT31A handles both heat and cool low voltage systems.

What does the Millivolt rating mean when the CT33A1009 is connected to my heating system?

Millivolt means the thermostat operates on the low voltage generated by a gas valve or pilot system, not on household line voltage.

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