To limit the probability that pool heaters will not be equipped with an adequate method to be easily shut off and restarted, which could lead to operation of the heater when not warranted, which could lead to unnecessary consumption of energy for pool water heating, which could lead to excessive use of energy, which could lead to an unacceptable effect on the environment.
To limit the probability that pool heaters will operate with a different temperature set-point than intended, which could lead to overheating of the pool water, which could lead to unnecessary consumption of energy for pool water heating, which could lead to excessive use of energy, which could lead to an unacceptable effect on the environment.