The manufacturer, GQF Mfg. Co.. Inc. guarantees against defect for a period of 1 year from date of purchase. Notify GQF Mfg. Co. directly of any defective items, giving catalogue number and name of Item and just what is wrong with Item. Send copy of Double R Supply invoice showing date of purchase. GQF Mfg. Co., themselves, not Double R Supply, will send replacement or notify regarding return. Returning of items without GQF's written permission will be at owner’s expense.Whereas GQF Mfg. Co. and / or Double R Supply have no control over usage of equipment supplied, they assumes no responsibility for losses or damage from their equipment other than replacement of defective parts. No guarantee on hatchablilty of eggs. Do not expose electrical parts to water. Installation of electrical parts should be done by qualified electrician.