View Full Version : Azoo heater: Keeps switching on and off

12/11/2009, 07:44 AM
I have an Azoo titanium heater controlled by an Apex controller. The controller turns on power to the heater at 79.5, and off at 80. The heater's own thermostat is set to 82.

The heater has a green indicator light when power is supplied, and a red light when the heater is heating. Although the green light stays on until the temperature reaches 80, the red light repeatedly switches on and off every 10-20 minutes. i.e. the heater is switching itself on and off even though it has not yet achieved the set temperature. I have never noticed other types of heater do this. Is this normal behavior for the Azoo or a fault ?


12/11/2009, 07:49 AM
With a controller you can set the heater thermostat at the max temp and just let the controller handle the on/off

12/11/2009, 08:08 AM
Hi Nanojg. That is what I am doing. But, although the controller is supplying power to the Azoo heater, the heater is switching itself on and off. i.e although power is supplied to the heater's control box (green power light on), the heater is not staying on constantly (red light on and off), even though the water has not yet reached the set temperature.

12/11/2009, 08:49 AM
In the first post you say the heater's thermostat is set to 82, is that the max temp for the heater?

12/11/2009, 10:01 AM
Yes. The controller shuts down power to the heater when the temp reaches 80.

12/11/2009, 10:12 AM
maybe some automatic timer within the heater?

12/11/2009, 10:37 AM
The 82 on the heater may be far from accurate. Try 84, 86 or whatever it takes so that both the red and green are on when the Apex turns it on. Dont turn it all the way up though.

12/11/2009, 10:41 AM
how large is the tank and heater (200w)?