What are the specs for this Thermostat?

The correct replacement for Tempstar model THA15R25STA — OEM 1058517 | Ships Today is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Tempstar equipment which lists the model number THA15R25STA — OEM 1058517 | Ships Today.

What symptoms indicate I need a new thermostat?

Common symptoms that indicate you need a new thermostat include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

Is this thermostat compatible with Bryant or Payne systems too?

Many Tempstar parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

Tempstar

Tempstar PTAC Thermostat for THA15R25STA — OEM 1058517 | Ships Today

Name: Tempstar PTAC Thermostat for THA15R25STA — OEM 1058517 | Ships Today
Brand: Tempstar
SKU: 1058517-GEN
Price: 64.95 USD
Availability: InStock

SKU: 1058517-GEN Brand: Tempstar

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Overview

This is the genuine OEM Tempstar PTAC thermostat (part number 1058517, "TSTAT PTAC X") for the THA15R25STA unit. The thermostat is the command center of the system — it senses room temperature and signals the unit to run heating or cooling to maintain your setpoint. When a PTAC thermostat fails, you may see no response to setpoint changes, a unit that runs continuously, short-cycling, or a system that will not switch between heating and cooling modes. Installing the correct OEM control restores reliable, accurate temperature management.

Specifications

Spec	Value
Part Number	1058517
Type	PTAC Thermostat (TSTAT PTAC X)
Brand	Tempstar / Heil / ICP
Fits Model	THA15R25STA
Fitment	OEM Direct Replacement

Compatibility

This OEM thermostat is designed for the Tempstar THA15R25STA and shares the ICP/Heil platform, so it also serves as the correct control across matching THA15-series PTAC and heat-pump units that originally shipped with part 1058517. Always verify your existing part number before ordering.

Installation Guide

Safety First — Disconnect power at the unit and breaker, then verify zero voltage with a multimeter.
Access — Remove the front cover/service panel to expose the control area.
Document — Photograph all wiring and terminal connections before disconnecting anything.
Remove — Unplug the wiring harness/terminal connections from the failed thermostat and unclip it from its mount.
Install — Mount the new 1058517 thermostat and reconnect each wire exactly per your photo.
Test — Restore power and verify heating, cooling, and mode switching respond correctly to the setpoint.

Signs You Need a Replacement

Unit does not respond to temperature setpoint changes
System runs continuously or short-cycles
Cannot switch between heating and cooling modes
Blank, frozen, or erratic display readings

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

Tempstar PTAC Thermostat for THA...

$64.95

Frequently Asked Questions

Does this Thermostat fit my Tempstar THA15R25STA — OEM 1058517 | Ships Today?

Yes. This is the factory-specified OEM thermostat for the Tempstar THA15R25STA — OEM 1058517 | Ships Today. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the thermostat on my Tempstar THA15R25STA — OEM 1058517 | Ships Today?

Refer to your equipment service manual for model-specific steps. General approach: turn off power, photograph connections, remove old part, install new part, restore power and test. For gas components, hire a licensed technician. Email info@nationalhvacparts.com for guidance.

What symptoms mean I need a new thermostat?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this thermostat compatible with Bryant or Payne too?

Many Tempstar parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my Tempstar thermostat?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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