Tempstar PTAC Thermostat for THB09K34SPA — OEM Control with Knob | Ships Today

Overview

This is a genuine OEM PTAC thermostat assembly for the Tempstar THB09K34SPA packaged terminal air conditioner. The set includes the thermostat control body (OEM part 1058517) and its matching control knob (OEM part 1058437). The thermostat senses room temperature and commands the unit to cycle heating and cooling to hold your setpoint. A failed thermostat is one of the most common causes of a PTAC that runs nonstop, refuses to start, short-cycles, or no longer reacts to the dial. Installing the exact OEM part restores correct temperature calibration and dependable switch contact that aftermarket controls frequently fail to replicate.

Specifications

Compatibility

This thermostat and knob set is the factory-specified comfort control for the Tempstar/Heil/ICP THB09K34SPA PTAC model and installs as a direct replacement for the original components.

Installation Guide

1. Safety First — Disconnect power at the unit and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the PTAC front cover and control housing service panel.
3. Document — Photograph all wire connections before disconnecting.
4. Remove — Pull the old knob off the shaft, disconnect the thermostat wiring, and unscrew the thermostat body from its bracket.
5. Install — Mount the new thermostat, reconnect wiring exactly per your photo, and press the new knob onto the shaft.
6. Test — Restore power and confirm the unit responds correctly in heat and cool modes.

Signs You Need a Replacement

• Unit runs continuously and never satisfies the setpoint.
• No response when adjusting the temperature dial.
• Knob slips, spins freely, or is cracked.
• Random short-cycling or incorrect room temperature.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.