When you need dependable fan control for an HVAC system, choose relays designed for 24V control, solid build quality, and broad compatibility. This guide highlights five suitable options and explains who benefits most from each. The top picks are ideal for Goodman blowers, furnaces, humidifiers, and other HVAC components, with practical notes on compatibility and limitations to help you decide.
Overview Of Top Picks
| Product | Best For | Key Benefit |
|---|---|---|
| Dreyoo 1 Pack 24V Fan Relay | Small HVAC upgrades | UL-certified, waterproof, 1-pole relay |
| 90370 General Purpose 24V AC Relay | Flexible control projects | Multiple contact forms (SPST-NO, SPST-NC, SPDT) |
| 2 Pack 24V Fan Relay (SZRKRLA) | Multi-system compatibility | Wide HVAC compatibility, robust construction |
| HUAREW APFR-360 90-360 | Replacement-friendly | Compatibility with popular models, solid specs |
| FrigeSwift 90380 90-380 (2-Pack) | Broad replacement options | Cross-brand compatibility and durable build |
Dreyoo 1 Pack 24V Fan Relay
Best for compact upgrades in Goodman-based or small HVAC setups. This 24V SPST relay is UL-certified and designed to protect circuits while handling a 12FLA load. The waterproof housing adds reliability in damp environments such as basements or equipment rooms. It’s a strong choice when you need a single-pole switch that’s easy to install and compatible with blower and humidifier applications.
Who this is for: homeowners or tech-savvy installers replacing a failed 24V control relay in Goodman systems or similar HVAC appliances. Why selected: compact, rugged design with UL support and a broad application range.
Caution: verify that the coil and contact ratings match your actual load to avoid overheating or nuisance tripping in high-current circuits.
90370 General Purpose 24V AC Relay
Best for flexible control projects needing multiple contact forms. This relay supports SPST-NO, SPST-NC, and SPDT configurations, suitable for various electromechanical signaling tasks, including fan control. With a 12A load rating, it handles moderate loads reliably, making it a versatile option for hobbyist HVAC projects or installers who need adaptable wiring options.
Who this is for: technicians requiring multiple switching configurations in a single device. Why selected: broad contact form options enable more complex control schemes without extra relays.
Caution: ensure your system voltage remains within the relay’s rated range to maintain longevity and safe operation.
2 Pack 24V Fan Relay (SZRKRLA)
Best for multi-system compatibility and DIY HVAC projects. These isolation relays are designed to work with a wide range of systems, including air conditioning, heating, pumps, and blowers, triggered by 24V signals. The build emphasizes durability, with metal components designed to resist wear and corrosion for longer service life.
Who this is for: homeowners upgrading multiple zones or installers standardizing on a single relay type across several units. Why selected: clear emphasis on compatibility and robust construction for varied HVAC environments.
Caution: confirm the physical dimensions and coil ratings match your existing relay footprint before installation to avoid fitment issues.
HUAREW APFR-360 90-360 24V AC Fan Relay
Choose this if you want broad model compatibility and a solid spec sheet. The 90-360 type is designed for 24V operation and supports a 12FLA / 60LRA rating at 125 VAC, with a 25A rating at 277 VAC resistive loads. It’s compatible with popular models such as Jard 92360 and Mars 90360, making it a practical replacement option in many Goodman and other HVAC configurations.
Who this is for: installers needing a reliable replacement relay that fits a broad set of control boards. Why selected: strong compatibility claims paired with clear electrical specifications.
Caution: verify the exact terminal mapping and mounting style to ensure a proper fit with your blower or heat sequencer.
FrigeSwift 90380 90-380 Heavy Duty Relay (2-Pack)
Best for broad replacement options across brands. The 90-380 heavy-duty relays are built to support multiple HVAC components, including Goodman blowers and pump starters, and can replace several leading brands. The dual-pack provides value for larger installations or service fleets requiring consistent parts across units.
Who this is for: service technicians or DIYers who need a reliable, widely compatible replacement relay. Why selected: broad compatibility and durable construction support long-term maintenance.
Caution: though widely compatible, always confirm coil voltage and contact rating align with your specific control board and load to prevent misfit issues.
Buying Guide: Key Considerations For HVAC Fan Relays
What coil voltage do you need? Most 24V AC relays match common thermostat and control board outputs. Confirm your system uses 24V control signals before purchasing.
What load can the relay switch? Check the relay’s FLA/LRA and resistive ratings to ensure it can safely handle your blower motor, humidifier, or pump start loads without overheating.
What contact form fits your application? SPST-NO, SPST-NC, and SPDT offer different switching options. Choose based on whether you need simple on/off control or a more complex switching arrangement.
How durable is the build? Look for metal or high-grade plastic housings and corrosion-resistant contacts, particularly in humid or dusty environments near furnaces and outdoor units.
Is it compatible with your model? Some relays advertise compatibility with many brands; always verify dimensions, terminal layout, and mounting to avoid fitment problems.
What about certifications? UL or other safety certifications add assurance for electrical safety and reliability in residential settings.
FAQ
- What is a 24V fan relay used for in HVAC systems?
It switches the blower, humidifier, or other accessories on and off in response to a 24V control signal from a thermostat or control board.
- Can I replace a relay with a different brand?
Yes, as long as coil voltage, current ratings, and terminal layout match your existing setup. Review the datasheet for compatibility.
- What does SPST, SPDT mean?
SPST means single-pole single-throw (on/off). SPDT provides a common contact with one normally open and one normally closed contact, enabling more complex switching.
- How do I know if a relay is too weak for my load?
Compare the load current (FLA/LRA) and voltage ratings to your blower or pump starter. If the load exceeds ratings, choose a higher-capacity relay.
- Are UL-certified relays more reliable?
UL certification indicates adherence to safety and performance standards, which can improve reliability and safety in residential installations.
- How many relays should I stock for HVAC maintenance?
Having a small kit with a couple of 24V relays and associated fuses covers most common failures in a home HVAC setup.
