R68AB0003  Mortex Heat Relay

Mortex R68AB0003 OEM Heat Relay The R68AB0003 is the factory heating‑stage relay used in Mortex air handlers and electric furnace systems. This 24‑volt relay energizes the electric heat strips and associated blower circuits, ensuring proper staging, safe operation, and reliable heating performance.

When older relays stick, chatter, or fail to close under load, the R68AB0003 restores correct heat‑strip activation and prevents intermittent or no‑heat conditions. Installs directly into Mortex control housings with OEM fitment.

Technical Specifications

• Relay Type: Heating relay

• Voltage: 24 VAC coil

• Function: Energizes heat strips / heating circuits

• Application: Mortex air handlers & electric furnaces

• Use Case: Heat‑stage switching, auxiliary heat control

• Mounting: OEM relay bracket / socket configuration

Cross‑Reference Block 

Cross Reference:

• R68AB0003 (current OEM)

• Mortex heat relay

• 24V heating‑stage relay

• Manufactured‑housing HVAC relay