When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Another user had this problem. It was something to do with his sensor he unplugged from the frame mounted filter. He went back and unplugged the sensor, cleaned it out and all was good.
Just make sure you prime the filter before attempting a start too. If not primed fully before a start, air can get in the system and trigger the false warning light. This was mentioned by another user in the thread.
I can’t find the thread but those 2 were the best and most useful replies.