Heat Siphon – Noise when stopped


Noises coming from the Heat Sipohn when it is off are usually rare but a few normal ones are

  • a slight buzzing from the 24 volt transformer which should be almost imperceptable. If it is loud then it may indicate a problem.
  • a hissing sound immediately after the unit shuts off which is the sound of refrigerant pressures equalizing through the thermoexpansion valve.
  • bubbles from the pump wich indicates a suction line leak in your pool piping