The display on my starite (max e therm) reads 84 (temp is set for 84); however, the actual temperature of the pool is 92 ie. heater is not shutting off at the set temp. Is this a thermistor problem?

The display on my starite (max e therm) reads 84 (temp is set for 84); however, the actual temperature of the pool is 92 ie. heater is not shutting off at the set temp. Is this a thermistor problem?