Why Is My Aquarium Heater Not Working. Web when the thermometer measures about 70, adjust the thermostat so the heater just comes on. Web answer (1 of 4):
Aquarium Heater, 25 W - image credit : www.carolina.com
You should be able feel the. Is this for a tropical tank? 1.4 the problem with the thermostat.
Aquarium Heater, 25 W
Web answer (1 of 11): Web if your aquarium heater light comes on even though the heater is not heating the water, there is probably a loose or broken electrical contact inside the. If the thermostat provided with the aqueon heater has become faulty, it won’t work properly. Web so you can put some water in a small bucket or other containers, then put the heater in the bucket.
