Why Would Air Lift Air Spring Bags Have Higher Pressure than Inflated After a Couple Days

Question:

The air lifts are a well made product and are working as they should. When I tow my travel trailer I usually run about 15 lbs. pressure. After towing for a couple of days I have noticed an increase in pressure. Sometimes as high as 30 lbs. Is this normal and why might this occur?

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Expert Reply:

That is quite the increase in air pressure! Are you by chance inflating the bags when it is cold out and then checking them in the heat of the day after the bags would have warmed up from the weather and friction from use?

Normally the troubleshooting question we get would be for leaking bags, not ones that self-inflate! What are you using to inflate the bags? If you don't have an onboard compressor the only explanation would be heat causing the air to expand or someone playing a prank on you.

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Jameson C

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