Tempstar PTAC Thermostat for THA07K25STC — OEM Control 1058517 | Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This is the genuine OEM PTAC thermostat control (part number 1058517, "TSTAT PTAC X") for the Tempstar THA07K25STC packaged terminal air conditioner. The thermostat is the brain of the PTAC unit — it reads room temperature and switches the compressor, fan, and electric heat strips to hold your setpoint. When this control fails, the unit may stop responding to temperature changes, run continuously, short-cycle, or fail to switch between heating and cooling modes. Because it is a factory part, it is calibrated to the exact switching logic and sensor curve the THA07K25STC was engineered around, eliminating the guesswork and compatibility issues common with universal replacements.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1058517 |
| Description | TSTAT PTAC X |
| Type | PTAC Thermostat Control |
| Brand | Tempstar (Heil / ICP) |
| Fits Model | THA07K25STC |
| Fit | OEM Replacement |
Compatibility
Designed as a direct-fit replacement for the Tempstar THA07K25STC PTAC unit and shared across the THA07K PTAC family marketed under the Tempstar, Heil, and ICP/Comfortmaker labels. Always confirm the printed part number (1058517) on your existing control before ordering.
Installation Guide
- Safety First — Disconnect power at the PTAC unit and the breaker, then verify zero voltage with a multimeter before touching any wiring.
- Access — Remove the front grille and service panel to expose the control box.
- Document — Photograph every wire and terminal position on the old thermostat before disconnecting anything.
- Remove — Unclip the wiring harness from the failed thermostat and release its mounting tabs/screws.
- Install — Seat the new 1058517 control, reconnect each wire to match your photo, and confirm the temperature sensor is routed to its original location.
- Test — Restore power, set a cooling and a heating call, and verify the compressor, fan, and heat respond correctly.
Signs You Need a Replacement
- Unit ignores temperature changes or won't reach setpoint
- Compressor or fan runs continuously, or short-cycles on and off
- No response when switching between heat and cool modes
- Blank, frozen, or unresponsive control after a power event
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