Tempstar PTAC Thermostat for THA07K25STA — OEM Part 1058517 | Ships Today
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Overview
This is the genuine OEM PTAC thermostat (part number 1058517) for the Tempstar THA07K25STA packaged terminal air conditioner. The thermostat is the brain of the PTAC unit — it reads room temperature and signals the compressor, fan, and heating elements to cycle on and off to maintain your setpoint. When a PTAC thermostat fails you will typically see the unit refusing to start, running continuously, short-cycling, or ignoring the temperature dial entirely. Because it is a direct factory replacement, it drops into the existing control pocket and wiring harness without adapters or rewiring. It is built for the low-voltage 24V control circuit used throughout the THA07K25STA platform.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1058517 |
| Type | PTAC Thermostat |
| Brand | Tempstar / Heil |
| Control Voltage | 24V |
| Fits Model | THA07K25STA |
| Fitment | OEM Direct Replacement |
Compatibility
Engineered specifically for the Tempstar/Heil THA07K25STA PTAC. As OEM part 1058517 it is the exact thermostat the unit shipped with from the factory, so no recalibration or controller reprogramming is required after installation.
Installation Guide
- Safety First — Disconnect power at the unit cord or breaker and verify zero voltage with a multimeter before touching any wiring.
- Access — Remove the PTAC front grille and control-housing service panel to expose the thermostat.
- Document — Photograph all thermostat wire terminations and the dial position before disconnecting anything.
- Remove — Release the thermostat mounting clip, slide it out of the control pocket, and disconnect the low-voltage leads.
- Install — Seat the new 1058517 thermostat, reconnect each lead exactly as photographed, and clip it into place.
- Test — Restore power, set a cooling and a heating call, and confirm the compressor and fan respond to the dial.
Signs You Need a Replacement
- Unit will not start or stop in response to the temperature dial
- PTAC runs continuously and never satisfies the setpoint
- Short-cycling — compressor turns on and off rapidly
- Erratic temperature control or no response to setpoint changes
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. 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