MARS

MARS is a manufacturer of replacement electric motors, fan blades, capacitors, contactors, and HVAC/R accessories for residential and commercial heating, air conditioning, and refrigeration service and repair applications. MARS provides reliable replacement and OEM motors across a wide range of HVAC applications including condenser fan, direct drive blower, belted fan, ECM, C-frame, and draft inducer motor types. MARS has been acquired by RectorSeal, and MARS product information is transitioning to the RectorSeal platform. MARS motors are available as OEM replacement motors for major HVAC equipment manufacturers including Goodman, Lennox, Rheem, and York, providing service technicians with direct replacement options without returning to OEM supply channels. HVAC service technicians, refrigeration contractors, and equipment repair shops specify MARS where a broad cross-reference of OEM motor replacements and HVAC/R electrical accessories is required from a single supply source.

MARS Product Lines

Replacement HVAC Motors

MARS replacement motors cover the major motor types found in residential and commercial HVAC systems: condenser fan motors, direct drive blower motors, belted fan and blower motors (5-inch frame), C-frame motors, ECM variable-speed motors, multi-HP motors, draft inducer motors, and OEM replacement motors cross-referenced to major HVAC equipment brands. MARS condenser fan motors are the most common replacement motor category for split-system air conditioning service, covering the permanent split capacitor (PSC) and electronically commutated motor (ECM) types found in outdoor condensing units. MARS OEM replacement motors are cross-referenced to Goodman, Lennox, Rheem, York, and other major brands, providing a direct drop-in replacement with performance specifications matched to the original motor.

Fan Blades

MARS fan blades cover the condenser fan blade sizes and pitch angles found in residential and commercial air conditioning condensing units. MARS fan blades are available in multiple diameters and blade configurations to match the original equipment fan blade specifications. A correct replacement fan blade must match the original in diameter, number of blades, pitch angle, and hub bore to deliver the design airflow across the condenser coil. MARS fan blades are made from high-impact materials designed to resist the temperature cycling and outdoor exposure conditions of condenser unit service. Where the MARS motor line serves the motor replacement need, MARS fan blades address the companion blade replacement when the original blade is damaged or out of specification.

Capacitors, Contactors, and HVAC Accessories

MARS HVAC accessories include run capacitors, start capacitors, motor contactors, crankcase heaters, defrost controls, fan and limit switches, motor protectors, pressure switches, relays, sequencers, and transformers. Run and start capacitors from MARS cover the capacitor microfarad and voltage ratings found in residential and commercial HVAC condensing unit and air handler electrical panels. MARS contactors provide replacement options for HVAC compressor and condenser fan contactor service. Defrost controls and sequencers address the timing and sequencing components in heat pump and electric heat systems. The MARS accessory line provides the electrical service components needed to complete HVAC service calls alongside motor and blade replacements.

Why Contractors Specify MARS

HVAC service technicians specify MARS because the brand provides a single-source cross-reference for condenser fan motors, blower motors, ECM motors, and fan blades across all major residential HVAC equipment brands without requiring OEM part numbers for every service call. MARS OEM replacement motors are cross-referenced to Goodman, Lennox, Rheem, York, and other major brands, allowing technicians to identify the correct replacement from motor specifications on the equipment nameplate. MARS provides replacement capacitors, contactors, defrost controls, relays, and other accessories alongside motors, reducing the number of suppliers a service technician needs to contact for a single HVAC repair. MARS is now part of RectorSeal, a manufacturer and distributor of HVAC specialty products. MARS products are available through SupplyHouse across the motor, blade, capacitor, and accessory product categories.

How to Choose a MARS Product

The primary selection variable for a MARS replacement motor is motor type. Condenser fan motors are used in outdoor condensing units and run in the ambient air stream; blower motors drive the air handler fan inside the building. C-frame motors are an older motor format used in some fan coil and unit heater applications. ECM motors provide variable-speed operation in two-stage and modulating systems. Match the MARS motor type to the motor type in the failed or worn unit.

For motor sizing, match the MARS replacement motor to the original using the motor nameplate data: horsepower (HP), full-load amps (FLA), RPM, voltage, and capacitor requirement in microfarads. MARS motors provide a cross-reference to OEM part numbers for Goodman, Lennox, Rheem, and York; search by OEM part number to find the MARS replacement where the nameplate data is unavailable. Confirm the shaft diameter and length of the MARS replacement motor match the original before installation.

For fan blade replacement, measure the original blade diameter, count the number of blades, identify the pitch angle (typically 25, 30, or 35 degrees), and measure the hub bore diameter. Match the MARS fan blade to these four parameters. An incorrect blade diameter or pitch angle will deliver incorrect airflow across the condenser coil, reducing system efficiency and potentially damaging the compressor from high head pressure.

FAQs

Who manufactures MARS motors and accessories?

MARS is now part of RectorSeal, which acquired MARS Parts effective November 2024. MARS product information is transitioning to the RectorSeal platform at marsdelivers.com and rectorSeal.com. MARS products continue to be available through HVAC supply distributors including SupplyHouse.

What warranty does MARS offer on its replacement motors?

MARS motor and accessory warranty terms are available through the product documentation and at marsdelivers.com. Confirm warranty coverage on a specific MARS motor or accessory with your distributor at the time of purchase.

What is the difference between MARS PSC condenser fan motors and ECM motors?

The difference between MARS PSC (permanent split capacitor) and ECM (electronically commutated motor) condenser fan motors is the motor technology and variable-speed capability. PSC motors run at a fixed speed and are the standard single-speed motor type in most residential condensing units. ECM motors are variable-speed and are used in two-stage and variable-capacity condensing units. Match the replacement motor type to the original motor on the condensing unit nameplate.

How do I identify the correct MARS replacement motor for my unit?

To identify the correct MARS replacement motor, read the original motor nameplate data: horsepower, full-load amps, RPM, voltage, and capacitor rating in microfarads. MARS provides a cross-reference to OEM part numbers for major HVAC brands; search by OEM part number if the nameplate data is incomplete. Confirm shaft diameter and length match the original before installation.

Are MARS capacitors available in the full range of microfarad ratings?

MARS run and start capacitors are available in the microfarad ratings and voltage ratings found in residential and commercial HVAC condensing unit and air handler electrical panels. Confirm the microfarad rating, voltage rating, and capacitor type (run or start) match the original before ordering a MARS replacement capacitor.

What MARS fan blade sizes are available for condenser unit replacement?

MARS fan blades are available in multiple diameters and blade configurations to match the condenser fan blade specifications of residential and commercial condensing units. Identify the original blade diameter, number of blades, pitch angle, and hub bore diameter from the equipment documentation or by measuring the original blade before ordering a MARS replacement.