Tempstar PTAC Thermostat for TEA15K25STC — OEM 1058517 | Ships Today

Overview

This is a genuine OEM PTAC thermostat (part number 1058517, "TSTAT PTAC X") for the Tempstar TEA15K25STC packaged terminal air conditioner. The thermostat is the control brain of the PTAC unit — it reads room temperature and signals the compressor, fan, and electric heat to cycle on and off to maintain setpoint. When this control fails, the unit may stop responding to temperature changes, run continuously, fail to switch between heating and cooling, or refuse to power the compressor at all. Replacing a failed thermostat with the exact OEM part restores precise temperature control and proper mode switching without guesswork.

Specifications

Compatibility

This OEM thermostat is the factory-specified control for the Tempstar TEA15K25STC PTAC unit and is shared across the ICP/Heil family of TEA-series packaged terminal air conditioners that use part 1058517. Always confirm the part number on your existing control or unit data plate before ordering to ensure an exact fit.

Installation Guide

1. Safety First — Disconnect power to the PTAC at the breaker or unplug the unit, and verify zero voltage with a multimeter before touching any wiring.
2. Access — Remove the front grille/cover and any control compartment panel to expose the thermostat.
3. Document — Photograph all wire connections and terminal positions on the old thermostat before disconnecting anything.
4. Remove — Label and disconnect the wiring harness, release the mounting clips or screws, and lift out the failed thermostat.
5. Install — Seat the new OEM thermostat in the same position, secure it, and reconnect the harness exactly as shown in your photos.
6. Test — Restore power, set the unit to cool and then heat, and confirm the compressor, fan, and heat respond correctly to setpoint changes.

Signs You Need a Replacement

• Unit ignores temperature changes or never reaches setpoint.
• PTAC runs continuously or short-cycles regardless of room temperature.
• No response when switching between heating and cooling modes.
• Blank, frozen, or unresponsive controls and buttons.

Shipping & Returns

Ships same day on orders placed before 3 PM CST. 30-day returns on unused parts. Backed by the National HVAC Parts fitment guarantee.