Anyone install on a 2 stage hvac? is the pressure from stage 1 sufficient to activate switch?

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.

Amps for plug-in version? there are two indications: 2.5amps (big sticker) and 15amps (diaphram part).

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.

stopped working after 1.5 months, unit is perfectly vertical and has a good seal on the duct. Anyone have any ideas for fixes?

mine stopped working when season changed and fan speed slowed on furnace motor sent back got a refund

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

Product ID: 160879622

Details

Operation Mode
Automatically
Contact Type
Normally Open
Connector Type
Plug In
Brand
Tjernlund
Item dimensions L x W x H
6.81 x 6.38 x
Mounting Type
Snap In Mount

⚙️Plug-in convenience

🌬️Airflow control

🇺🇸Proudly USA-made

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26532 kr

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Description

Breathe Easy, Live Smart! 🌟

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.

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.

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26532 kr

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