Tempstar PTAC Thermostat for THB09K34DCA — OEM Low-Temp Control with Knob | Ships Today

Overview

This is a genuine OEM PTAC thermostat control set for the Tempstar THB09K34DCA packaged terminal air conditioner. It includes the standard PTAC thermostat (OEM part 1058517), a low-temperature protection thermostat (OEM part 1059022), and the matching control knob (OEM part 1058437). The PTAC thermostat senses room temperature and cycles heating and cooling to hold your setpoint, while the low-temp thermostat protects the unit from coil freeze-up and cold-weather faults. When either control fails, the unit may run nonstop, refuse to start, short-cycle, or lock out on a false freeze condition. The exact OEM parts restore correct calibration and reliable switching.

Specifications

Compatibility

This thermostat, low-temp control, and knob set is the factory-specified comfort and protection control for the Tempstar/Heil/ICP THB09K34DCA PTAC model and installs as a direct OEM replacement.

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, disconnect both thermostats, and unscrew them from their brackets.
5. Install — Mount the new thermostat and low-temp control, reconnect wiring per your photo, and press on the new knob.
6. Test — Restore power and verify correct heat, cool, and freeze-protection response.

Signs You Need a Replacement

• Unit runs continuously and never reaches setpoint.
• Frequent freeze lockouts or coil icing in cool mode.
• No response to the temperature dial.
• Knob is cracked, slipping, or spins freely.

Shipping & Returns

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