

Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The Supco RO81 is a combination relay and overload replacement component used in single-phase hermetic compressor applications. It combines the start relay and overload protector into a single unit, simplifying installation and reducing the number of components required during a service call. Constructed from ABS material, this part is a direct OEM-style replacement designed for HVAC and refrigeration technicians who need a reliable, drop-in solution when servicing compressors in residential and light commercial equipment.
The RO81 is suited for use in refrigeration and air conditioning systems that use small hermetic compressors. Typical install scenarios include refrigerators, freezers, window air conditioners, and similar sealed compressor units. Technicians replacing a failed start relay, overload, or both components will find this combination unit a straightforward substitution for the original parts.
Designed as an OEM-style replacement relay overload for small hermetic compressors found in residential refrigeration and light commercial cooling equipment.
Installation of relay overload components should be performed by a qualified HVAC or refrigeration technician. Disconnect power to the unit completely before removing or installing any compressor components. The relay must be oriented correctly per the compressor terminal layout to ensure proper start and run operation. Refer to the equipment service manual for terminal identification before proceeding.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
Add install kit to cart
—
Thanks for subscribing!
This email has been registered!