Tempstar PTAC Thermostat for TEB12K25SPA — 24V Control with Replacement Knob | Ships Today

Overview

This is the genuine OEM PTAC (Packaged Terminal Air Conditioner) thermostat assembly for the Tempstar TEB12K25SPA unit, supplied with the matching control knob (OEM 1058437) and the 24V thermostat body (OEM 1058517). The thermostat senses room temperature and switches the 24V control circuit to call for cooling, heating, or fan operation. A failed PTAC thermostat typically causes the unit to run continuously, miss its setpoint, short-cycle, or stop responding to the dial. A worn or cracked knob is an equally common complaint, so the correct OEM knob is included for precise, reliable setpoint adjustment.

Specifications

Compatibility

A direct-fit replacement for the Tempstar TEB12K25SPA PTAC. The ICP/Tempstar/Heil TEB12K25 family of packaged terminal units shares a common parts platform, so confirm your unit's model and serial tag before ordering. This is the integrated PTAC control, not a programmable wall thermostat.

Installation Guide

1. Safety First — Disconnect power at the unit cord/disconnect and verify zero voltage with a multimeter.
2. Access — Remove the PTAC front cover and control box panel.
3. Document — Photograph all thermostat wire connections before disconnecting.
4. Remove — Pull the old knob, release the thermostat mounting clips/screws, and disconnect the leads.
5. Install — Mount the new thermostat, reconnect each lead per your photo, and press on the new knob.
6. Test — Restore power and confirm the unit responds to setpoint changes in cool, heat, and fan modes.

Signs You Need a Replacement

• Unit runs nonstop or will not maintain the set temperature
• No response when turning the temperature dial
• Cracked, loose, or stripped control knob
• Short-cycling or erratic compressor/fan operation

Shipping & Returns

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