---
product_id: 672472995
title: "MICRO-AIR EasyStart Flex 398 Soft Start Kit for Home & RV Air Conditioner"
brand: "micro-air"
price: "HK$5501"
currency: HKD
in_stock: true
reviews_count: 9
category: "Micro Air"
url: https://www.desertcart.hk/products/672472995-micro-air-easystart-flex-398-soft-start-kit-for-home
store_origin: HK
region: Hong Kong
---

# 75% surge reduction Bluetooth diagnostics DIY 4-wire install MICRO-AIR EasyStart Flex 398 Soft Start Kit for Home & RV Air Conditioner

**Brand:** micro-air
**Price:** HK$5501
**Availability:** ✅ In Stock

## Summary

> ❄️ Cool starts, zero drama—upgrade your AC game today!

## Quick Answers

- **What is this?** MICRO-AIR EasyStart Flex 398 Soft Start Kit for Home & RV Air Conditioner by micro-air
- **How much does it cost?** HK$5501 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/672472995-micro-air-easystart-flex-398-soft-start-kit-for-home)

## Best For

- micro-air enthusiasts

## Why This Product

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

## Key Features

- • **Power Surge Slayer:** Slash startup amps by up to 75%, protecting breakers and your electric bill.
- • **Effortless DIY Setup:** Color-coded 4-wire hookup with step-by-step video guides—no electrician needed.
- • **Universal HVAC Upgrade:** Fits 2-6 ton single-stage, two-stage, and heat pump systems for versatile home or RV use.
- • **Generator-Ready Cooling:** Seamlessly run your AC on backup generators during outages—stay cool off-grid.
- • **Silent Smart Protection:** Eliminates startup noise, flickering lights, and brownouts with built-in fault detection and app control.

## Overview

The MICRO-AIR EasyStart Flex 398 Soft Start Kit reduces locked-rotor startup current by up to 75%, preventing breaker trips and lowering power surges for home and RV air conditioners up to 6 tons. Featuring a simple 4-wire color-coded installation with video guides, it supports single-stage, two-stage, and heat pump systems. The kit enables smooth operation on backup generators, eliminates loud compressor startup noise and light flickering, and offers Bluetooth app diagnostics with built-in fault protection. Portable, weatherproof, and USA-made, it’s a smart upgrade for reliable, quiet, and energy-efficient cooling.

## Description

Buy MICRO-AIR EasyStart Flex 398 Soft Start Kit for Home & RV Air Conditioner | Includes Installation Kit, 75% Inrush Reduction, For Units <6 Tons (72k BTU), Silence Startup Noise, Weatherproof, USA Made: Air Conditioners - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Wow, what a difference! - This easyStart is so simple to install and it worked perfect. From the moment I restored power to our 3 1/2 ton unit. Within five cycles it had reduced the surge amperage to 21 A and I can’t hear it start up anymore from inside the house. Highly recommended. The only negative I can tell is it is Short Bluetooth range meaning you need to be right near the unit to make that work. I would prefer to have long range so I could do it from inside the home and not have to stand out in 110° temperatures to look at readings.
Review: It DOES work. - I this worth the cost of entry? YES, if the claims hold true and this unit lasts, the cost of the unit should most certainly extend the life of the condenser. Is it easy to install? YES, they've done a great job with the installation instructions in both YouTube and pdf formats. The initial start up amps for me were 54 amps and the unit would dim the lights and it was quite loud on startup. I have a 2024 Trane and recently bought this home. I got this easy start kit and WOW! No lights dimming, no loud noise and a start up amperage of 19.3 to 20.1 within the first 5 cycles. That said, for the price it would have been nice to have WiFi instead of Bluetooth BUT, I understand the reasoning behind the choice. Here's hoping this gives me many more years of reliable use.

## Features

- AMP & SURGE REDUCTION: Lowers locked-rotor inrush current by up to 75% to prevent annoying breaker trips. This ac soft start kit for home and RV systems optimizes peak power draw and protects your electrical circuits during heavy compressor startup.
- EASY DIY INSTALLATION: Featuring a simple 4-wire hookup with color-coded wiring for convenient setup, this air conditioner soft start kit includes helpful step-by-step video guides so homeowners can complete the installation without any hassle.
- BACKUP GENERATOR POWER: Our soft starter enables central cooling systems to run smoothly on portable or standby backup generators amidst sudden power outages. Explore a HVAC soft start kit for off-grid living and truly reliable emergency and low power setups.
- UNIVERSAL COMPATIBILITY: Promising smooth integration with single-stage, two-stage, and heat pump cooling systems rated from 2 to 6 tons, this highly versatile 3 ton ac soft start kit easily upgrades various residential outdoor HVAC compressors.
- QUIET & SMART PROTECTION: The Micro-Air EasyStart Flex 398 eliminates loud compressor clunks, light flickering, and brownouts during startup, and features convenient Bluetooth app diagnostics along with complete built-in fault system protection.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DKQN4XRJ |
| Additional Features | Portable |
| Air Conditioner Application | Residential, RV, Commercial |
| BEE Star Rating | 5 Star |
| Best Sellers Rank | #3,358 in Automotive ( See Top 100 in Automotive ) #7 in RV Heating, Ventilation & Air Conditioning |
| Brand | MICRO-AIR |
| Brand Name | MICRO-AIR |
| Capacity | 6 tons |
| Color | White |
| Compressor Type | rotary_scroll |
| Control Method | App |
| Controller Type | App Control |
| Customer Reviews | 4.6 out of 5 stars 762 Reviews |
| Efficiency | 15 |
| Form Factor | Portable |
| Included Components | Installation Kit |
| Installation Type | Packaged |
| Inverter Type | No Inverter |
| Item Dimensions D x W x H | 9"D x 4"W x 3"H |
| Manufacturer | MICRO-AIR |
| Model Name | MicroAir Flex 398 with Installation Kit |
| Model Number | 398 KIT |
| Operating Mode | Cooling |
| Power Source | Corded Electric |
| Product Dimensions | 9"D x 4"W x 3"H |
| Room Type | Multi-purpose |
| Seasonal Energy Efficiency Ratio (SEER) | 15 |
| Special Feature | Portable |
| UPC | 850049469227 |
| Unit Count | 1 Count |
| Voltage | 240 |
| Warranty Type | Lifetime |
| Wattage | 21102 watts |

## Product Details

- **Brand:** MICRO-AIR
- **Capacity:** 6 tons
- **Color:** White
- **Form Factor:** Portable
- **Model Name:** MicroAir Flex 398 with Installation Kit
- **Power Source:** Corded Electric
- **Product Dimensions:** 9"D x 4"W x 3"H
- **Seasonal Energy Efficiency Ratio (SEER):** 15
- **Special Feature:** Portable
- **Voltage:** 240

## Images

![MICRO-AIR EasyStart Flex 398 Soft Start Kit for Home & RV Air Conditioner - Image 1](https://m.media-amazon.com/images/I/71k7dj0tiQL.jpg)
![MICRO-AIR EasyStart Flex 398 Soft Start Kit for Home & RV Air Conditioner - Image 2](https://m.media-amazon.com/images/I/71Ca85DdiCL.jpg)
![MICRO-AIR EasyStart Flex 398 Soft Start Kit for Home & RV Air Conditioner - Image 3](https://m.media-amazon.com/images/I/71fW4AiKsDL.jpg)
![MICRO-AIR EasyStart Flex 398 Soft Start Kit for Home & RV Air Conditioner - Image 4](https://m.media-amazon.com/images/I/712XV2tVckL.jpg)
![MICRO-AIR EasyStart Flex 398 Soft Start Kit for Home & RV Air Conditioner - Image 5](https://m.media-amazon.com/images/I/81BeDWOnSEL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: How do I install it?**
A: An installation kit is included with each product and easy to follow DIY installation instructions are available on Hutch Mountain's website.

**Q: Can I install it myself (DIY)?**
A: Yes, many customers successfully DIY it in under an hour, though some recommend having an electrician if unfamiliar with HVAC wiring.

**Q: Can it be installed outside in the weather?**
A: Yes, it is IP65 rated for outdoor use. It is strongly recommended to be installed inside the A/C service panel or sheltered area to further protect the unit.

**Q: Is the enclosure waterproof?**
A: Yes, it is IP65 rated for outdoor use and is weather resistant to rain and snow (but not pressure washing).

**Q: What is the wire/whip length?**
A: Approximately 4 feet, allowing mounting some distance from the AC unit.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Wow, what a difference!
*by S***N on August 13, 2026*

This easyStart is so simple to install and it worked perfect. From the moment I restored power to our 3 1/2 ton unit. Within five cycles it had reduced the surge amperage to 21 A and I can’t hear it start up anymore from inside the house. Highly recommended. The only negative I can tell is it is Short Bluetooth range meaning you need to be right near the unit to make that work. I would prefer to have long range so I could do it from inside the home and not have to stand out in 110° temperatures to look at readings.

### ⭐⭐⭐⭐⭐ It DOES work.
*by J***. on August 8, 2026*

I this worth the cost of entry? YES, if the claims hold true and this unit lasts, the cost of the unit should most certainly extend the life of the condenser. Is it easy to install? YES, they've done a great job with the installation instructions in both YouTube and pdf formats. The initial start up amps for me were 54 amps and the unit would dim the lights and it was quite loud on startup. I have a 2024 Trane and recently bought this home. I got this easy start kit and WOW! No lights dimming, no loud noise and a start up amperage of 19.3 to 20.1 within the first 5 cycles. That said, for the price it would have been nice to have WiFi instead of Bluetooth BUT, I understand the reasoning behind the choice. Here's hoping this gives me many more years of reliable use.

### ⭐⭐⭐⭐⭐ MICRO-AIR EasyStart FLEX 398
*by A***. on May 28, 2026*

The MICRO-AIR EasyStart FLEX 398 - Bluetooth Soft Start Kit for Home Air Conditioner, was very easy to install. I had some questions about the app. So I called Hutch Mountain. They were very friendly and professional. install my easy start on my 4-ton Carrier A/C, which required 108 initial starting amp to start the compressor. After installing the easystart, it reduced the starting amps to 49 from 108 amps. within the five cycles for the easystart to learn, the starting amps went down to 28.9 amps. A week later the starting amps are 27.7 to start the compressor. The MICRO-AIR EasyStart FLEX 398 has reduce the starting amps from 108 to 27 for my A/C. A reduction of 75%. I know I will see a cost savings on my electric bill. Also, my A/C unit operates a lot smoother and quieter. Before installing the MICRO-AIR EasyStart FLEX 398 you could hear when my A/C was starting. Today it is so quiet that I have to go outside to check my A/C to see if it is running. My A/C turns on, runs for about 15 to 20 minutes then shuts off and may turn back on 4o to 60 minutes later. I feel and I am noticing my A/C is running more EFFIECENTLY!!! I strongly recommend this product for all to install in their A/C units. What an AWESOME PRODUCT!!!!

## Frequently Bought Together

- MICRO-AIR EasyStart FLEX 398 - Bluetooth Soft Start Kit for Home Air Conditioner, RV & Commercial Use, Works with Generators, Reduces Power Surge, Efficient Start-Up - Up to 6 Tons w/Installation Kit
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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-09-05*