Tempstar PTAC Thermostat for THA15R34STC — OEM Part 1058517 | Ships Today

Overview

This is a genuine OEM PTAC thermostat (manufacturer part number 1058517, "TSTAT PTAC X") for the Tempstar THA15R34STC. The thermostat is the command center of your packaged terminal air conditioner/heat pump, reading room temperature and signaling the unit to cycle heating and cooling on and off. When the thermostat fails, the system may run constantly, refuse to start, short-cycle, or hold the wrong temperature. Replacing a failed control with the exact OEM part restores reliable, accurate temperature management without guesswork over wiring or calibration.

Specifications

Compatibility

Engineered as the factory control for the Tempstar THA15R34STC packaged terminal system. As an ICP-family part, 1058517 is also shared across equivalent Heil, Comfortmaker, and ICP packaged terminal models. Always confirm the part number on your existing thermostat before ordering.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring.
2. Access — Remove the front cover/service panel to expose the control and its terminal block.
3. Document — Photograph all wire connections and note terminal labels before disconnecting anything.
4. Remove — Release the old thermostat from its mount and disconnect the wire harness/terminals.
5. Install — Mount the new 1058517 thermostat and reconnect each wire exactly as shown in your photo.
6. Test — Restore power, set a call for cooling and heating, and confirm the unit cycles correctly and holds setpoint.

Signs You Need a Replacement

• Unit runs continuously or will not respond to temperature changes
• Short-cycling — heating/cooling turns on and off rapidly
• Room temperature never matches the setpoint
• Blank, frozen, or unresponsive controls

Shipping & Returns

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