After spotting water pooling on floor I found Reverse Osmosis unit leaking. The problem was a fault that developed right through the plastic body, a pressure leak. This could have been a disaster! I found "standard" replacement units do not fit. It must be replaced with same defective part! Also inside washer is deteriorating!
Customer service is non existent as no one answered phone. I spent an hour listening to deliberately horrible hold music. Avoid GE Appliances!