We purchased a Raypak E3T Electric Heater as a replacement so we would have the digital control temperature setting. Easy installation for replacement heater. Worked great for one week. It had only 90 day warranty because my husband installed it. Tried to contact Raypak for warranty service no help. They don't deal with residents at all. Found warranty service provider over 100 miles away so in order for them to come have to pay $100 trip charge. Tried calling Pool Supply Unlimited they were no help. Stated can not help with warranty. In my opinion they should at least contact Raypak on our behalf and Raypak should send out service provider free of charge.