Tempstar PTAC Thermostat for TEB09K50STA — 24V Knob Control Kit | Ships Today

Overview

This OEM PTAC thermostat assembly (part 1058517) and matching control knob (part 1058437) replace the temperature-control unit on the Tempstar TEB09K50STA packaged terminal air conditioner. The thermostat senses room temperature and switches the 24V control circuit to cycle the compressor and fan, while the knob lets the occupant select a setpoint. As the contacts erode or the sensing element drifts, the unit may overshoot temperature, short-cycle, or stop responding to the dial entirely — and a cracked knob makes accurate adjustment impossible. Replacing the thermostat and knob as a set restores dependable comfort control.

Specifications

Compatibility

Built for the Tempstar TEB09K50STA PTAC and interchangeable across ICP, Heil, and Comfortmaker PTAC units sharing the same control plate and 24V thermostat circuit. Confirm your knob spline and thermostat mounting before ordering.

Installation Guide

1. Safety First — Disconnect power at the unit disconnect and verify zero voltage with a multimeter.
2. Access — Remove the PTAC front cover to expose the control panel.
3. Document — Photograph all thermostat wire terminals before disconnecting.
4. Remove — Pull the old knob off the shaft, then unscrew and disconnect the failed thermostat.
5. Install — Mount the new thermostat, reconnect the leads per your photo, and press on the new knob.
6. Test — Restore power, set a low setpoint, and confirm the unit cycles on and off at temperature.

Signs You Need a Replacement

• Room temperature drifts well past the set point
• Compressor short-cycles or runs without shutting off
• Knob is cracked, loose, or spins without engaging
• No reaction when turning the temperature dial

Shipping & Returns

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