Tempstar PTAC Thermostat for TEA12R25STA — OEM 1058517 X Control | Ships Today

Overview

This is the genuine OEM PTAC thermostat (part number 1058517, "TSTAT PTAC X") for the Tempstar TEA12R25STA. The thermostat is the command center for your PTAC unit, sensing room temperature and signaling the system to heat, cool, or run the fan. When it fails, the unit may not respond to setpoint changes, short-cycle, run continuously, or stop responding altogether. Replacing it with the correct OEM control restores accurate, reliable temperature management without guesswork on wiring or compatibility.

Specifications

Compatibility

Engineered as a direct fit for the Tempstar TEA12R25STA PTAC system. Because it is the OEM part (1058517), it matches the original control's connector, mounting, and logic exactly. It is also used across related ICP/Heil/Tempstar PTAC platforms that call out the same part number — verify the number on your existing thermostat before ordering.

Installation Guide

1. Safety First — Disconnect power to the PTAC unit at the breaker and verify zero voltage with a multimeter before touching any wiring.
2. Access — Remove the front grille and service panel to expose the control area.
3. Document — Photograph all thermostat wire connections before disconnecting anything.
4. Remove — Unplug the thermostat harness and release the thermostat from its mounting clips/bracket.
5. Install — Seat the new 1058517 thermostat in the bracket and reconnect the harness exactly per your photo.
6. Test — Restore power, set a heat and a cool call, and confirm the unit responds correctly at each setpoint.

Signs You Need a Replacement

• Unit ignores setpoint changes or won't turn on/off
• Constant running or rapid short-cycling
• Inaccurate room temperature readings
• Unresponsive or blank/erratic controls

Shipping & Returns

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