What are the specs for this Thermostat?

The correct replacement for Tempstar model THA12R25STD — OEM Part 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 THA12R25STD — OEM Part 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 THA12R25STD — OEM Part 1058517 | Ships Today

Name: Tempstar PTAC Thermostat for THA12R25STD — OEM Part 1058517 | Ships Today
Brand: Tempstar
SKU: 1058517-GEN
Price: 64.00 USD
Availability: InStock

SKU: 1058517-GEN Brand: Tempstar

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Overview

This is the genuine OEM PTAC thermostat (part number 1058517, "TSTAT PTAC X") for the Tempstar THA12R25STD packaged terminal heat pump. The thermostat is the control hub of the PTAC — it reads room temperature and signals heating or cooling to maintain your setpoint. When it fails, the unit may ignore temperature changes, short-cycle, run continuously, or fail to switch between modes. Fitting the correct OEM control restores precise, reliable operation.

Specifications

Spec	Value
Part Number	1058517
Description	TSTAT PTAC X
Type	PTAC Thermostat
Brand	Tempstar (ICP / Heil)
Fits Model	THA12R25STD
Fitment	OEM Replacement

Compatibility

This thermostat is the factory-specified control for the Tempstar THA12R25STD PTAC heat pump and related ICP/Heil packaged terminal units using OEM part 1058517. Confirm your existing part number before ordering.

Installation Guide

Safety First — Disconnect power to the PTAC unit and verify zero voltage with a multimeter.
Access — Remove the front cover and control-area service panel.
Document — Photograph all wiring and connector positions before disconnecting.
Remove — Unplug the thermostat harness and release the old thermostat from its clips.
Install — Seat the new thermostat and reconnect the harness exactly per your photo.
Test — Restore power, send a heating then a cooling call, and verify the unit responds.

Signs You Need a Replacement

Unit ignores setpoint or won't turn on
Nonstop running or rapid short-cycling
Won't switch between heating and cooling modes
Blank, frozen, or unresponsive controls

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...

$64.00

Frequently Asked Questions

Does this Thermostat fit my Tempstar THA12R25STD — OEM Part 1058517 | Ships Today?

Yes. This is the factory-specified OEM thermostat for the Tempstar THA12R25STD — OEM Part 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 THA12R25STD — OEM Part 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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