Best Time Delay Relays For HVAC Systems

Are you looking for the best time delay relays for HVAC systems?
We compare 10 reliable options to help you choose the right voltage, delay time, fit, and easy setup for your heating and cooling system.

A time delay relay can help your HVAC system run with less stress. Users often say it helps stop fast starts and keeps the blower on at the right time. That can mean better comfort and fewer worries.

In this guide, we list the best time delay relays for heat pumps, air handlers, and furnaces. We check voltage range, delay time, fit, and easy setup. You will see which pick is best for your needs.

We keep it clear, fair, and useful. Read on to find the right relay before your next repair or upgrade.

List of Top 10 Time Delay Relays For HVAC Systems

Title	Best For	Price
White-Rodgers Blower Time Delay Relay, 57T01-843	This relay is perfect for HVAC techs and home or shop owners with AC or heat pump air handlers. It lets the blower use cool air after the compressor stops.	View on Amazon (paid link)
Weasch QD-068 Delay on Make Timer, 0.03-10 Min Adjustable HVAC Relay	This delay timer is perfect for HVAC pros and DIYers working on heat pumps, air handlers, or water pumps. It’s easy to install and fits tight spaces.	View on Amazon (paid link)
ICM Controls ICM203 Delay on Break Timer \| ICM203B Universal Voltage Anti Short Cycle Compressor Protection Relay \| 18 to 240 VAC \| Adjustable 1.8 to 600 Seconds \| ICM 203 B	This part is perfect for HVAC techs and homeowners. It protects your system from costly wear.	View on Amazon (paid link)
Weasch 2 Pack QD-068 Delay on Make Timer, 0.03-10 Min Adjustable HVAC Relay	This product is perfect for HVAC contractors and DIY technicians who need reliable and easy-to-install timers for residential and light commercial HVAC systems. It’s ideal for quick replacements or seasonal tune-ups.	View on Amazon (paid link)
ICM Controls ICM102 DOM Timer, 10 Minutes Adjustable,Multicolor	Technicians will like this tool because it fits many models easily. It works well with anticipator thermostats.	View on Amazon (paid link)
24CZ-1 Q101 Electric Furnace Sequencer Device, 1SPST 24 Volt On 1-20 Off 40-110, for Delayed Operation of Electric Furnaces, Fan, Heat Pumps, Gas Furnace	This 24CZ-1 Q101 Electric Furnace Sequencer is perfect for HVAC professionals and homeowners who need a reliable replacement for their heating systems. It’s ideal for electric furnaces, fans, heat pumps, and gas furnaces that require precise delayed operation.	View on Amazon (paid link)
Weasch 4 Pack QD-068 Delay on Make Timer, 0.03-10 Min Adjustable HVAC Relay	This 4-pack of delay-on-make timers is perfect for HVAC contractors and DIY technicians. It’s ideal for anyone working on heat pumps, air handlers, or commercial refrigeration systems.	View on Amazon (paid link)
BAOMAIN Delay ON Break Timer QD-072 1.5A 18-240 VAC 0.03-10 Minutes Adjustable Time Delay Switch Replacement (2-Pack)	This BAOMAIN Delay ON Break Timer is perfect for anyone needing a reliable, adjustable time delay switch. It’s great for DIY projects, home automation, or replacing old timers.	View on Amazon (paid link)
Blower Delay Device Fit for White-Rodgers Trane HVAC System	This part is for White-Rodgers and Trane heat systems. Pick it if your fan blows cold air at start or you need a simple relay swap.	View on Amazon (paid link)
Multifunction Time Relay 16A Delay ON Off Time Relay GRT8-M1 AC DC 12-240V，10 Relay Timer Control Delay Function Mode DIN Rail Electronic Relays of Wide Time Delay Range for 0.1 Seconds to 10 Days	This tool is perfect for factory workers and tech experts who manage big machines. It is ideal for anyone needing safe delays for motors and lights in homes or offices.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 time delay relays for HVAC systems, handpicked for reliability and performance. Each product is expert-reviewed to ensure it meets your needs, whether for comfort, efficiency, or affordability. Find the perfect fit to enhance your system’s smooth operation and longevity.

1. White-Rodgers Blower Time Delay Relay, 57T01-843

The White-Rodgers 57T01-843 is a blower time delay relay for air handlers. It works with AC and heat pump systems.

It keeps the blower on after the compressor stops. This helps move leftover cool air into the room.

The on delay is 2 seconds. The off delay is 80 seconds. It uses plastic standoff mounting.

Pros	Cons
Boosts cooling by blowing residual cooled air into your space. Delays blower shut-off, ensuring efficient air circulation. Easy plastic standoff mounting for quick installation. Improves system efficiency with 2-second on, 80-second off delay.	Only works with some AC and heat pump systems Fixed timing may not fit every need Plastic mount may feel less strong

Perfect For:

This relay is perfect for HVAC techs and home or shop owners with AC or heat pump air handlers. It lets the blower use cool air after the compressor stops.

Ready to Purchase?

View Price on Amazon (paid link)

Best Furnace Time Delay Relays

2. Weasch QD-068 Delay on Make Timer, 0.03-10 Min Adjustable HVAC Relay

The Weasch QD-068 Delay on Make Timer is a reliable tool for HVAC systems. It controls timed startups for heat pumps, air handlers, and more.

It works with 18-240 VAC/DC and handles up to 1.5A. The cut-wire jumper makes setup easy for 24 VAC or 110/240 VAC. Its compact design fits tight spaces.

The trickle current bypass prevents false triggering. It includes standard spade terminals for quick installation. Perfect for contractors and DIY techs.

Pros	Cons
Wide use for HVAC and refrigeration systems. Easy setup with cut-wire jumper for voltage flexibility. Compact design fits tight spaces effortlessly. Reliable protection against false triggering with bypass resistor. Perfect for DIY and professional repairs.	Cutting the jumper is permanent. Low max current limits heavy loads. No digital display for exact timing.

Perfect For:

This delay timer is perfect for HVAC pros and DIYers working on heat pumps, air handlers, or water pumps. It’s easy to install and fits tight spaces.

Ready to Purchase?

View Price on Amazon (paid link)

3. ICM Controls ICM203 Delay on Break Timer | ICM203B Universal Voltage Anti Short Cycle Compressor Protection Relay | 18 to 240 VAC | Adjustable 1.8 to 600 Seconds | ICM 203 B

ICM Controls ICM203 Delay on Break Timer | ICM203B Universal Voltage Anti Short Cycle Compressor Protection Relay | 18 to 240 VAC | Adjustable 1.8 to 600 Seconds | ICM 203 B

Protect your HVAC system. Stop costly wear. Save money today.

Save your compressor from short cycling. Get precise control with custom delays.

Install in seconds with two wires. Enjoy reliable performance all year long.

Pros	Cons
Protects your compressor from costly short cycling damage. Adjustable delay for perfect HVAC or refrigeration control. Fits any system with wide voltage compatibility. Quick, reliable 2-wire installation for easy setup.	Needs basic wiring skills to use. Might not fit all old units.

Perfect For:

This part is perfect for HVAC techs and homeowners. It protects your system from costly wear.

Ready to Purchase?

View Price on Amazon (paid link)

4. Weasch 2 Pack QD-068 Delay on Make Timer, 0.03-10 Min Adjustable HVAC Relay

Protect your HVAC system from damage. Stop power spikes with this delay timer. Keep your gear safe today.

Save money with a two-pack. Fix your air conditioner fast.

Pros	Cons
Wide HVAC use for many systems. Easy two-wire setup saves time. Adjustable startup delay helps protect equipment. Trickle current bypass blocks false starts. Two-pack value keeps a spare ready.	Cutting the jumper wire feels permanent. Limited to 1.5A maximum output current. Two wires might confuse absolute beginners.

Perfect For:

This product is perfect for HVAC contractors and DIY technicians who need reliable and easy-to-install timers for residential and light commercial HVAC systems. It’s ideal for quick replacements or seasonal tune-ups.

Ready to Purchase?

View Price on Amazon (paid link)

5. ICM Controls ICM102 DOM Timer, 10 Minutes Adjustable,Multicolor

The ICM102 DOM Timer is a versatile and powerful device. It offers universal voltage operation and a higher 1.5 amp power rating.

This timer works with anticipator-type thermostats and replaces many others. It has knob-adjustable time delays from .03 to 10 minutes.

Pros	Cons
Works with many voltages for easy use. Handles up to 1.5 amps with ease. Set delays from 1.5 to 600 seconds. Turn the knob to set the time. One timer fits many jobs in the field.	Knob setup may feel less exact Basic look may not suit all panels 1.5 amps limits heavier loads

Perfect For:

Technicians will like this tool because it fits many models easily. It works well with anticipator thermostats.

Ready to Purchase?

View Price on Amazon (paid link)

6. 24CZ-1 Q101 Electric Furnace Sequencer Device, 1SPST 24 Volt On 1-20 Off 40-110, for Delayed Operation of Electric Furnaces, Fan, Heat Pumps, Gas Furnace

24CZ-1 Q101 Electric Furnace Sequencer Device, 1SPST 24 Volt On 1-20 Off 40-110, for Delayed Operation of Electric Furnaces, Fan, Heat Pumps, Gas Furnace

The 24CZ-1 Q101 is a 24-volt heat sequencer for compatible HVAC systems. It uses one normally open switch to control heat.

The switch closes 1 to 20 seconds after power starts. It opens 40 to 110 seconds after power stops. Each unit is factory tested.

It can replace many listed models, but check fit and wiring first. A qualified HVAC tech should use the unit diagram to install it.

Pros	Cons
Replaces many models, saving time and money on repairs. UL recognized, ensures safety and reliability for your system. Factory tested, guarantees quality and performance right away. Precise delays, matches your equipment’s needs for smooth operation.	Not plug-and-play: Requires professional installation for safe use. Fixed delays: No adjustable timing, must match equipment needs. Specific fit: Double-check compatibility to avoid returns.

Perfect For:

This 24CZ-1 Q101 Electric Furnace Sequencer is perfect for HVAC professionals and homeowners who need a reliable replacement for their heating systems. It’s ideal for electric furnaces, fans, heat pumps, and gas furnaces that require precise delayed operation.

Ready to Purchase?

View Price on Amazon (paid link)

7. Weasch 4 Pack QD-068 Delay on Make Timer, 0.03-10 Min Adjustable HVAC Relay

The Weasch 4 Pack QD-068 Delay on Make Timer is a reliable solution for HVAC systems. It offers timed startup control for various equipment. This 4-pack is ideal for residential and light commercial setups.

With simple installation and wide voltage compatibility, it’s a valuable spare for HVAC contractors and DIY enthusiasts. The compact design fits tight spaces, ensuring efficient system servicing.

Pros	Cons
Wide use for HVAC and refrigeration systems. Easy setup with cut-wire jumper for 24V or 110/240V. Compact design fits tight electrical boxes. Reliable protection against false triggering with bypass resistor. Value pack of 4 timers for complete system needs.	Line-voltage setup requires cutting the jumper. Compact size may be hard to read. Fixed delay range may not fit every system.

Perfect For:

This 4-pack of delay-on-make timers is perfect for HVAC contractors and DIY technicians. It’s ideal for anyone working on heat pumps, air handlers, or commercial refrigeration systems.

Ready to Purchase?

View Price on Amazon (paid link)

8. BAOMAIN Delay ON Break Timer QD-072 1.5A 18-240 VAC 0.03-10 Minutes Adjustable Time Delay Switch Replacement (2-Pack)

Meet the BAOMAIN delay timer. It gives you total power control.

Twist the handy knob to set your time. Choose up to ten minutes of delay.

This pack includes two reliable switches. They fit tight spaces with ease. Buy yours today and fix your gear fast!

Pros	Cons
Adjustable time delays for customized control. Wide voltage range fits most systems. Compact size saves space in setups. Reliable performance after power failure.	1.5A limit may not fit high-power loads. 10-minute max limits longer delay needs. Special delay mode may not suit all uses.

Perfect For:

This BAOMAIN Delay ON Break Timer is perfect for anyone needing a reliable, adjustable time delay switch. It’s great for DIY projects, home automation, or replacing old timers.

Ready to Purchase?

View Price on Amazon (paid link)

9. Blower Delay Device Fit for White-Rodgers Trane HVAC System

The Blower Delay Device is a perfect fit for White-Rodgers Trane HVAC systems. It improves efficiency by adding a 2-second start delay and an 80-second shutdown delay, ensuring smooth air flow and better heat transfer.

It’s easy to install, made of high-quality materials, and works reliably for long-term use. This device replaces multiple models and enhances your HVAC system’s performance.

Pros	Cons
Stops cold drafts right at start up Saves energy with smart fan timing Built to last with tough materials Easy to install in just minutes Fits right in as a direct replacement	Limited compatibility, only fits White-Rodgers Trane systems. No advanced features, just basic delay function. Requires manual installation, not plug-and-play.

Perfect For:

This part is for White-Rodgers and Trane heat systems. Pick it if your fan blows cold air at start or you need a simple relay swap.

Ready to Purchase?

View Price on Amazon (paid link)

10. Multifunction Time Relay 16A Delay ON Off Time Relay GRT8-M1 AC DC 12-240V，10 Relay Timer Control Delay Function Mode DIN Rail Electronic Relays of Wide Time Delay Range for 0.1 Seconds to 10 Days

Multifunction Time Relay 16A Delay ON Off Time Relay GRT8-M1 AC DC 12-240V，10 Relay Timer Control Delay Function Mode DIN Rail Electronic Relays of Wide Time Delay Range for 0.1 Seconds to 10 Days

The GRT8-M1 time relay sets exact on and off delays. It can time from 0.1 sec to 10 days.

It works on 12–240V AC/DC and up to 16A. It has 10 timer modes for many uses. LED lights show its state.

This DIN rail relay is small and easy to fit. Use it for lights, heat, motors, and machines. It has 30-day returns and a 3-year warranty.

Pros	Cons
Ultimate timing flexibility from 0.1 seconds to 10 days. Versatile control with 10 different delay functions. Sturdy build featuring industrial grade ABS plastic. Easy installation on standard 35mm DIN rails. Risk-free purchase backed by a 3-year warranty.	Setup can feel hard Needs a 35mm DIN rail Has only one output contact

Perfect For:

This tool is perfect for factory workers and tech experts who manage big machines. It is ideal for anyone needing safe delays for motors and lights in homes or offices.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Time delay relays help your HVAC system run better. They stop fast starts and keep the blower on at the right time. This guide shows the best time delay relays for your needs.

Factors to Consider When Buying:

Voltage Range: Make sure the relay works with your system’s voltage. Most relays handle 18-240 VAC/DC, but check your setup.
Delay Time: Choose a relay with the right delay settings. Some offer 0.03 to 10 minutes, while others have fixed times like 2 seconds on, 80 seconds off.
Fit and Size: Pick a relay that fits your space. Compact designs work well in tight areas.
Easy Setup: Look for relays with simple wiring and clear instructions. Standard spade terminals and cut-wire jumpers make installation easier.
Reliability: Choose a relay from a trusted brand. Factory-tested and high-quality materials ensure long-term use.
Compatibility: Check if the relay works with your HVAC system, like heat pumps, air handlers, or furnaces.
Extra Features: Some relays have trickle current bypass or LED indicators. These add value and protect your system.