It's easy to judge water heaters only by their energy efficiency, price, or warranty length, but reviews say this is a big mistake. Warranty length can be a clue to the amount of insulation or other construction details, but both contractors and owners say warranty service is a lot more important. We found many hair-raising complaints from owners of water heaters with 12-year warranties. Warranties usually cover only parts, not labor, and most warranties are valid only for the original owner -- voided as soon as the house is sold. Some warranties require odd things like proof that a barely accessible lint filter has been cleaned every three months. Even a warranty still in force isn't much comfort if parts and technical support aren't available or there are long delays in obtaining them -- or worse, the tank leaks, flooding your house.
Several reviews and plumbing forums agree that Bradford White water heaters have the best reputation for build quality and rapid repairs. Rheem/Ruud, which also makes water heaters under the GE, Marathon and Richmond brands, comes in a close second. One of the largest water heater manufacturers, A.O. Smith, makes some very energy-efficient water heaters under its own brand name, as well as Kenmore, Whirlpool and several other water-heater brands. However, contractors rank A.O. Smith water heaters well below average, and owners reviewing Kenmore and Whirlpool water heaters agree.
Reviews suggest checking with a trusted plumber as the best way to make sure repairs will be swift and cost-effective. Some energy-efficient water heaters use circuit boards that are easily damaged but require replacement, making these water heaters very costly to repair. Other models may also require special-order parts that delay repairs; meanwhile you have no hot water.
