Tempstar PTAC Thermostat for THB09K34STA — OEM Control with Knob | Ships Today

Overview

This is a genuine OEM PTAC (Packaged Terminal Air Conditioner) thermostat assembly for the Tempstar THB09K34STA unit. It includes the thermostat control body (OEM part 1058517) and the matching control knob (OEM part 1058437). The thermostat is the brain of your PTAC's comfort control — it senses room temperature and signals the unit to cycle heating or cooling to maintain your setpoint. When this component fails, the unit may run continuously, fail to start, short-cycle, or stop responding to the dial entirely. Using the exact OEM thermostat guarantees correct temperature calibration and reliable contact operation that generic replacements often cannot match.

Specifications

Compatibility

This thermostat and knob set is the factory-specified control for the Tempstar/Heil/ICP THB09K34STA PTAC model. It is a direct, drop-in replacement for the original components in this packaged terminal air conditioner.

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 the control housing service panel.
3. Document — Photograph all wire connections before disconnecting anything.
4. Remove — Pull the old control knob off the shaft, then 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 verify the unit responds correctly to the dial in both heat and cool modes.

Signs You Need a Replacement

• Unit runs constantly and will not cycle off at setpoint.
• No response when turning the temperature dial.
• Control knob spins freely or is cracked and slipping.
• Erratic short-cycling or wrong-temperature operation.

Shipping & Returns

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