Tempstar Thermostat for TEB12R25DCA — PTAC Low-Temp Control with Knob | Ships Today
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Overview
This OEM thermostat package fits the Tempstar TEB12R25DCA PTAC unit and includes the standard PTAC thermostat (part 1058517), the low-temperature thermostat control (part 1059022), and the matching adjustment knob (part 1058437). The PTAC thermostat governs normal room temperature control over the 24V circuit, while the low-temp thermostat acts as a protective limit — it senses excessively cold conditions and modifies operation to prevent coil freeze-up or cold-weather damage. Together they keep the unit cycling correctly and protected in low ambient conditions. When either thermostat fails, you get loss of temperature control, freeze faults, or a unit that ignores setpoint commands. These are genuine OEM 24V replacements.
Specifications
| Spec | Value |
|---|---|
| Part Numbers | 1058517 (PTAC tstat), 1059022 (low-temp tstat), 1058437 (knob) |
| Type | PTAC Mechanical Thermostat + Low-Temp Control |
| Brand | Tempstar (ICP / Heil) |
| Control Voltage | 24V |
| Fitment | OEM Direct Replacement |
| Includes | PTAC thermostat + low-temp thermostat + knob |
Compatibility
Designed as a direct fit for the Tempstar TEB12R25DCA PTAC system. The TEB12 control platform is shared across ICP, Tempstar, Heil, and Comfortmaker packaged terminal units — confirm part numbers if your model suffix differs.
Installation Guide
- Safety First — Disconnect power at the unit disconnect and verify zero voltage with a multimeter.
- Access — Remove the front grille and service panel to expose the control box.
- Document — Photograph every thermostat lead and terminal before disconnecting.
- Remove — Pull the knob, release both thermostats from their brackets, and disconnect the 24V leads.
- Install — Mount the new PTAC and low-temp thermostats, reconnect per your photo, and fit the new knob.
- Test — Restore power and confirm normal cycling plus correct low-temp protection response.
Signs You Need a Replacement
- Unit will not hold setpoint or runs without stopping.
- Coil freeze-ups or nuisance shutdowns in cold conditions.
- No response when the dial is adjusted.
- Cracked, loose, or missing control knob.
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.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days