---
product_id: 160879622
title: "Tjernlund PS1503P Plug-in Air Pressure Activation Switch for Duct Fans in Central Heating and Air Conditioning Systems"
brand: "tjernlund"
price: "6110543₫"
currency: VND
in_stock: true
url: https://www.desertcart.vn/products/160879622-tjernlund-ps1503p-plug-in-air-pressure-activation-switch-for-duct
store_origin: VN
region: Vietnam
---

# Plug-in convenience Airflow control Proudly USA-made Tjernlund PS1503P Plug-in Air Pressure Activation Switch for Duct Fans in Central Heating and Air Conditioning Systems

**Brand:** tjernlund
**Price:** 6110543₫
**Availability:** ✅ In Stock

## Summary

> Breathe Easy, Live Smart! 🌟

## Quick Answers

- **What is this?** Tjernlund PS1503P Plug-in Air Pressure Activation Switch for Duct Fans in Central Heating and Air Conditioning Systems by tjernlund
- **How much does it cost?** 6110543₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/160879622-tjernlund-ps1503p-plug-in-air-pressure-activation-switch-for-duct)

## Best For

- tjernlund enthusiasts

## Why This Product

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

## Key Features

- • **Heritage Quality:** Manufactured by a trusted 81-year-old family business in the USA.
- • **Easy Installation:** Choose between direct wiring or plug-in options for hassle-free setup.
- • **Fool-Proof Design:** Simple bladder mechanism ensures reliability without complex circuits.
- • **Effortless Activation:** Automatically turns duct fans on/off with air pressure.
- • **Universal Compatibility:** Works seamlessly with any brand duct fan.

## Overview

The Tjernlund PS1503P Plug-in Air Pressure Activation Switch is designed to enhance the efficiency of your central heating and air conditioning systems by automatically controlling duct fans. With its fool-proof technology and easy installation options, this switch is compatible with any duct fan and is proudly manufactured in the USA by a family-owned business with over 80 years of experience.

## Description

Tjernlund PS1503P Plug-in Air Pressure Activation Switch for Duct Fans in Central Heating and Air Conditioning Systems

## Features

- Air pressure activation switch automatically turns on and off any device, but in particular it turns duct fans on and off based on the furnace and/or air conditioner blower coming on.
- Works with any brand duct fan, including Tjernlund Duct Booster Fans.
- Choose either simple black-to-black, white-to-white wiring (PS1503) or plug-in version (PS1503P).
- Fool-Proof Tech: simple bladder fills and allows power to flow to the fan, so no errors from over engineered circuit boards.
- Manufactured in the USA and backed by a 81-year-old family business.

## Product Details

- **Operation Mode:** Automatically,Off
- **Contact Type:** Normally Open
- **Connector Type:** Plug In
- **Brand:** Tjernlund
- **Item dimensions L x W x H:** 6.81 x 6.38 x 6.34 inches
- **Mounting Type:** Snap In Mount
- **Actuator Type:** Air Pressure
- **Contact Material:** Copper Or Brass Or Silver
- **International Protection Rating:** IP00
- **Connectivity Protocol:** X-10

## Images

![Tjernlund PS1503P Plug-in Air Pressure Activation Switch for Duct Fans in Central Heating and Air Conditioning Systems - Image 1](https://m.media-amazon.com/images/I/61Z-qT7IRLL.jpg)

## Questions & Answers

**Q: Anyone install on a 2 stage hvac?  is the pressure from stage 1 sufficient to activate switch?**
A: problem I found was that the pressure switch would come on but  wasn't shutting off, you are correct first stage may not be enough pressure unless you have this on the main trunk and not on one of the laterals to a specific room that is already showing to be low on pressure which is probably why you want to add it to the system. a current sensing relay on the furnace attached to the power on the added fan  is a better way of turning on the fan if you want my advise.

**Q: Amps for plug-in version?  there are two indications: 2.5amps (big sticker) and 15amps (diaphram part).**
A: Mine I hard wired. But I am guessing it is telling you the line required amperage. So if you use a plug in version it requires a 15amp line which is common. The line aI tapped into was 15 amp.

**Q: stopped working after 1.5 months, unit is perfectly vertical and has a good seal on the duct. Anyone have any ideas for fixes?**
A: mine stopped working when season changed and fan speed slowed on furnace motor sent back got a refund

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-23*