The Innomax website sells repair parts and can help you out. The Ideal Rest doesn't seem to be listed as a current product, but they do list parts. 1-800-466-6629
Many have found leaks in the hose connections - some near were the hose attaches to the pump and some where the hose attaches to the air bladder. Try using soapy water to look for air bubbles. Kids bubble fluid sold at Walmart is a great way to find the leaks.
As an FYI, some of use tired of the bed and it's problems and have replaced the whole mattress with a non-air, non-electric, non-leaking mattress. NOTE. The sizing is different for RV Kings so you have to find a mattress that fits the space.