Tempstar PTAC Thermostat for TEB09K50DCA — Low-Temp 24V Control | Ships Today

Overview

This is a genuine OEM PTAC (Packaged Terminal Air Conditioner) thermostat assembly for the Tempstar TEB09K50DCA, including the control thermostat (part 1058517), the matching control knob (part 1058437), and a low-temperature cutout thermostat (part 1059022). The thermostat is the brain of the unit's comfort control, sensing room temperature and cycling the compressor and electric heat to hold your setpoint. The low-temp thermostat protects the system in cold ambient conditions. When this 24V control fails, the unit may run continuously, fail to reach setpoint, short-cycle, or stop responding to the knob entirely.

Specifications

Compatibility

Engineered as the factory-correct thermostat group for the Tempstar TEB09K50DCA PTAC unit. Always confirm your model and part numbers against the unit's rating plate before ordering to guarantee fitment.

Installation Guide

1. Safety First — Disconnect power at the unit and breaker; verify zero voltage with a multimeter before touching any wiring.
2. Access — Remove the front grille and service panel to expose the control box.
3. Document — Photograph all thermostat and low-temp wire connections before disconnecting.
4. Remove — Pull the control knob, release the thermostat mounting clip/screws, and disconnect the leads from the old thermostat and low-temp switch.
5. Install — Mount the new thermostat and low-temp switch, reconnect each lead per your photo, and press on the new knob.
6. Test — Restore power, set a call for cooling and heating, and confirm the unit responds at the correct setpoints.

Signs You Need a Replacement

• Unit runs constantly or never shuts off at setpoint
• No response when turning the temperature knob
• Short-cycling or erratic on/off operation
• Heat or cool will not engage in cold weather (failed low-temp thermostat)

Shipping & Returns

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