---
product_id: 11160121
title: "ICM253 Adjustable Fan Delay Timer | Post-Purge Off Delay Control | 12–390 Second Adjustable Delay | 18–30 VAC | UL Recognized HVAC Blower Fan Control Board for Efficiency & Comfort"
brand: "icm controls"
price: "€ 74.11"
currency: EUR
in_stock: true
reviews_count: 8
category: "Icm Controls"
url: https://www.desertcart.fi/products/11160121-icm253-adjustable-fan-delay-timer-post-purge-off-delay-control
store_origin: FI
region: Finland
---

# 12–390 sec adjustable delay 18–30 VAC universal compatibility UL recognized, easy 2-wire install ICM253 Adjustable Fan Delay Timer | Post-Purge Off Delay Control | 12–390 Second Adjustable Delay | 18–30 VAC | UL Recognized HVAC Blower Fan Control Board for Efficiency & Comfort

**Brand:** icm controls
**Price:** € 74.11
**Availability:** ✅ In Stock

## Summary

> ⏱️ Upgrade your HVAC game with precision timing and effortless efficiency!

## Quick Answers

- **What is this?** ICM253 Adjustable Fan Delay Timer | Post-Purge Off Delay Control | 12–390 Second Adjustable Delay | 18–30 VAC | UL Recognized HVAC Blower Fan Control Board for Efficiency & Comfort by icm controls
- **How much does it cost?** € 74.11 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/11160121-icm253-adjustable-fan-delay-timer-post-purge-off-delay-control)

## Best For

- icm controls enthusiasts

## Why This Product

- Trusted icm controls brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Auto Reset:** Automatically resets delay timer if thermostat reactivates, ensuring uninterrupted comfort and system responsiveness.
- • **Precision Fan Control:** Customize your HVAC fan delay from 12 to 390 seconds for optimal air purging and energy efficiency.
- • **UL Certified & User-Friendly:** Meets UL873 safety standards with simple 2-wire connections for quick, hassle-free installation or replacement.
- • **Durable Solid-State Reliability:** Engineered with a 1-amp rated output and solid-state timing for consistent, long-lasting performance.
- • **Universal Voltage Compatibility:** Seamlessly integrates with standard 18–30 VAC control circuits across furnaces and air handlers.

## Overview

The ICM Controls ICM253 Adjustable Fan Delay Timer offers a customizable 12 to 390-second post-purge delay to maximize HVAC efficiency and comfort. Compatible with 18–30 VAC systems, it features solid-state reliability, smart auto-reset functionality, and UL certification for safe, easy installation. Ideal for professionals seeking precise blower fan control and energy savings.

## Description

Post-purge fan delay timer with adjustable 12-390-second time delay.

Review: Purging Conditioned Air from the System - It's a very useful device. It allows me to make the fan on the central air continue running for a short while after the compressor ends its cycle; otherwise, they both stop when the thermostat setpoint is reached. The range for the delay is anywhere from 12 to 390 seconds. Anecdotally, I have already seemed to have found that it reduces the loss of cool temperature into the encapsulated crawl space. Now I just need to determine how long to run to purge the conditioned air through the system.
Review: Delay Relay Works Great But Some Caveats - As others have said, the schematic printed on the relay is wrong! The accompanying piece of paper is correct. Pins 2 & 3 require a constant 24VAC. With pin 2 being the red wire and pin 3 the black (common). You connect the green (fan) wire from the thermostat to pin 4. Connect pin 1 to your fan relay. When the relay receives a signal from the thermostat on pin 4, it connects pins 1 & 2 together. The relay says it will do a delay of 12-390 seconds. This is wrong. The shortest delay (the dial pointing at 12) is 2 minutes and 56 seconds. I have left it connected with the 3-minute delay. It seems to be working okay.

## Features

- ⚡𝗔𝗱𝗷𝘂𝘀𝘁𝗮𝗯𝗹𝗲 𝗣𝗼𝘀𝘁-𝗣𝘂𝗿𝗴𝗲 𝗧𝗶𝗺𝗲𝗿 - Customize fan delay from 12 to 390 seconds to maximize HVAC system efficiency and comfort by purging residual air after the thermostat cycle ends.
- ⚡𝗨𝗻𝗶𝘃𝗲𝗿𝘀𝗮𝗹 𝟮𝟰𝗩𝗔𝗖 𝗖𝗼𝗺𝗽𝗮𝘁𝗶𝗯𝗶𝗹𝗶𝘁𝘆 - Designed for standard 18–30 VAC control circuits, ideal for furnaces, air handlers, or other blower motor applications.
- ⚡𝗥𝗲𝗹𝗶𝗮𝗯𝗹𝗲 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 - Built with solid-state timing and 1-amp rated output, ensuring dependable operation and long-lasting durability under demanding HVAC conditions.
- ⚡𝗦𝗺𝗮𝗿𝘁 𝗔𝘂𝘁𝗼 𝗥𝗲𝘀𝗲𝘁 𝗙𝘂𝗻𝗰𝘁𝗶𝗼𝗻 - If the thermostat signal reactivates during delay, the timer automatically resets — preventing unwanted fan shutdowns and improving system responsiveness.
- ⚡𝗨𝗟 𝗥𝗲𝗰𝗼𝗴𝗻𝗶𝘇𝗲𝗱 & 𝗘𝗮𝘀𝘆 𝘁𝗼 𝗜𝗻𝘀𝘁𝗮𝗹𝗹 - Meets UL873 safety standards for HVAC systems and features simple 2-wire connections for quick installation or replacement of OEM blower delay boards.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000E24YQA |
| Best Sellers Rank | #392,929 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #358 in HVAC Controls |
| Brand | ICM Controls |
| Brand Name | ICM Controls |
| Color | Multicolor |
| Customer Reviews | 4.2 out of 5 stars 83 Reviews |
| Global Trade Identification Number | 00800442000688 |
| Included Components | Control |
| Item Dimensions D x W x H | 6"D x 6"W x 6"H |
| Manufacturer | ICM Controls |
| Manufacturer Part Number | ICM253 |
| Material | Metal |
| Material Type | Metal |
| Model Number | ICM253 |
| Number of settings | 1 |
| Product Dimensions | 6"D x 6"W x 6"H |
| UPC | 800442000688 |
| Unit Count | 1 Count |

## Product Details

- **Color:** Multicolor
- **Brand:** ICM Controls
- **Material:** Plastic Or Resin
- **Product Dimensions:** 6"D x 6"W x 6"H
- **UPC:** 800442000688

## Images

![ICM253 Adjustable Fan Delay Timer | Post-Purge Off Delay Control | 12–390 Second Adjustable Delay | 18–30 VAC | UL Recognized HVAC Blower Fan Control Board for Efficiency & Comfort - Image 1](https://m.media-amazon.com/images/I/51tW03m9iiL.jpg)

## Questions & Answers

**Q: Does it turns on immediately and stays on until break plus the delay time requested?**
A: Hello.This relay has a post purge manually adjustable delay from 12 to 390 second.Let us know if you have any other questions.Customer Support Team of PartzStop.

**Q: If trigger power is restored during the delay, will it still cut off when the delay time is reached?**
A: The question is a bit ambiguous with out a wiring diagram.  The normal application is to extend the on signal.  This is a control relay, it does not power the fan directly.  The unit extends power on "control" by up to 5 minutes.  If the trigger is off due to power outage the relay is off too. The timer starts over when power on is restored and the trigger is high.

**Q: would this work on dc?**
A: I am not sure if it work with DC. There could be internal circuits that could get damaged with direct current.
You may want to submit your question in their website. I believe it is www dot icmcontrols dot com

**Q: From the 12 second setting how many seconds are added with each adjustment**
A: Considering the graduation, does not look like it is linear! If I have to guess, it maybe 40 seconds each marking after the 12. After number 12, there are four more divisions then number 200 then again another four and last number is 390. Go figure!!

## Customer Reviews

### ⭐⭐⭐⭐⭐ Purging Conditioned Air from the System
*by R***N on July 7, 2025*

It's a very useful device. It allows me to make the fan on the central air continue running for a short while after the compressor ends its cycle; otherwise, they both stop when the thermostat setpoint is reached. The range for the delay is anywhere from 12 to 390 seconds. Anecdotally, I have already seemed to have found that it reduces the loss of cool temperature into the encapsulated crawl space. Now I just need to determine how long to run to purge the conditioned air through the system.

### ⭐⭐⭐⭐ Delay Relay Works Great But Some Caveats
*by M***Y on December 11, 2025*

As others have said, the schematic printed on the relay is wrong! The accompanying piece of paper is correct. Pins 2 & 3 require a constant 24VAC. With pin 2 being the red wire and pin 3 the black (common). You connect the green (fan) wire from the thermostat to pin 4. Connect pin 1 to your fan relay. When the relay receives a signal from the thermostat on pin 4, it connects pins 1 & 2 together. The relay says it will do a delay of 12-390 seconds. This is wrong. The shortest delay (the dial pointing at 12) is 2 minutes and 56 seconds. I have left it connected with the 3-minute delay. It seems to be working okay.

### ⭐⭐⭐⭐⭐ Installation and Review
*by R***T on August 22, 2016*

Works as intended--the fan still runs ON SELECTED TIME after the condenser turned off from outside. I set mine to about 2 minutes after the thermostat cuts off the A/C. Installation: Like the diagram on the ICM253 unit. --1 and 4--bypass (undo and reconnect) the current GREEN wire from the Fan (1) and the GREEN wire from the thermostat (4) --2 and 3--tap (add into existing) into the 24vac from the RED (2) and BLUE/common/neutral (3) wires I did not see the BLUE/COMMON/NEUTRAL 24vac wire once the furnace was opened. The wire diagram makes no sense at all !!! Google and YouTube did not help. So I removed the two screws and take out the cover that protected/covered the wirings and the 24v transformer (besides the breakers). I look for the 24v transformer and its Common/Neutral wire---It has wires out for the 24vac and wires in from the 240vac (labeled on the transformer...see picture). I saw the 24vac Common/Neutral wire (gray colored on this wire). I also saw that it was connected to the condenser outside...I simply tapped into that gray colored wire and done. Hope it helps someone out a bit. Have a great day.

## Frequently Bought Together

- ICM Controls ICM253 Fan Delay Timer, 12-390 Seconds Adjustable Off Delay
- Supco 90340 General Purpose Switching Relay, 24 V Coil Voltage, Double Pole Double Throw Contacts

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-22*