Went on a service call today for a customer whose pool water is not heating up. Its a Teledyne Laars 250,000 btu, unit fires up nice and seems to be operating normally. Pool water just doesnt seem to be getting hot. He says usually after a few hours the supply pipe to the pool is hot to the touch. Customer had the heater goinfg for 4 hrs before I got there and water coming out of the heater was luke warmm at best. Filter and all seem to be clean, customer says that he hasnt had to add water at all (rules out leaks) Any ideas?
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Pool heater help