Tempstar PTAC Thermostat Knob & Control Kit for THB09K50SPA — 24V PTAC | Ships Today

Overview

This OEM thermostat and knob assembly fits the Tempstar THB09K50SPA packaged terminal air conditioner (PTAC). The kit includes the 24V PTAC thermostat (OEM 1058517) and its matching control knob (OEM 1058437). The thermostat reads room temperature and cycles the compressor and heat contactor to hold the setpoint. PTAC thermostats are high-cycle parts in hotels and multi-family housing, and a failed unit shows up as a room that won't hold temperature, short-cycles, or won't change modes. The correct OEM replacement restores accurate control without re-calibration.

Specifications

Compatibility

Direct OEM fit for the Tempstar/Heil/ICP THB09K50SPA PTAC. Thermostat and knob ship together so the dial indexes correctly after install. Verify your model and serial tag before ordering.

Installation Guide

1. Safety First — Disconnect power at the PTAC plug or breaker and verify zero voltage with a multimeter.
2. Access — Remove the front grille and control panel cover.
3. Document — Photograph all wiring and the knob orientation before disconnecting.
4. Remove — Pull the knob, release the thermostat clip/screws, and disconnect the 24V leads.
5. Install — Mount the new thermostat, reconnect per your photo, and press on the new knob aligned to the index.
6. Test — Restore power and confirm the unit responds in both heat and cool.

Signs You Need a Replacement

• Room overshoots or never reaches the setpoint.
• Compressor short-cycles or won't start.
• Knob is cracked, spins freely, or won't index.
• No response when switching heat/cool modes.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.