Tempstar Pressure Switch for TVH825GKA101 — OEM Draft Safety Switch | Ships Today

Overview

This is the OEM Pressure Switch Assembly (part number 1188015) for the Tempstar TVH825GKA101. The pressure switch is a safety device that confirms proper inducer draft and venting before the control board allows the burners to ignite. It senses the negative pressure created by the inducer motor and closes its contacts only when combustion gases are being vented safely. A faulty switch will lock the furnace out and cause a no-heat condition with a diagnostic fault code. Common failure symptoms include the furnace failing to ignite, the inducer running with no ignition, short cycling on a draft error, or a code indicating a stuck-open or stuck-closed pressure switch.

Specifications

Compatibility

This pressure switch assembly is the factory replacement for the Tempstar TVH825GKA101 and is shared across ICP/Heil/Tempstar equipment using the same venting platform. Verify part number 1188015 against your existing switch before installing.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the furnace service panel to reach the inducer and switch.
3. Document — Photograph the wiring and draft tube routing before disconnecting.
4. Remove — Pull the spade terminals, disconnect the silicone tube, and unscrew the old switch.
5. Install — Mount the new switch, reconnect the tube and wiring per your photo, checking the tube for cracks or moisture.
6. Test — Restore power and confirm a full ignition cycle with no pressure fault.

Signs You Need a Replacement

• Inducer runs but burners never ignite.
• Diagnostic LED shows a pressure switch fault code.
• Intermittent no-heat calls or short cycling on draft faults.
• Contacts will not close despite confirmed inducer draft.

Shipping & Returns

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