navien ch series

  1. B

    Navien CH-240 circ pump blowing 5A fuses

    I have been helping a friend with a combi unit (Navien CH-240 ASME) issue and am in need of some advice... I maintain my own tankless system but only for DHW so I know enough to be dangerous! Hopefully this is the right forum for this topic. Short story: What started with a small leak at the...
  2. Joe B

    Uponor zone module shows zone valves on, but not calling for heat

    I am trying to piece together the behavior of my six-zone Navien CH240 hyrdonic system. Heat is radiant floor pex tubing under concrete. Thermostats are Uponor WT 1, one thermostat per zone, wired to a pair of 3-zone Wirsbo zone control modules. I am trying some experiments. Today I have a...
  3. byroncheung

    Navien ch240 error code e02?

    Hydro coil in the airhandler bursted. Had a guy came to replace the coil, initially the boiler was showing e02 (low water pressure in the heating side), he messed with it a little bit (drained, purged air etc) and got it working. but a few hours later e02 came back and it's not working again...
  4. Bathsheba

    Navien CH-180 victory

    So this is the only place on the internet that might appreciate this story, and I wanna tell someone. My CH-180 was installed 7 years ago and it's been nothing but trouble. Lots of ignition problems, never been able to heat the apartment properly when it's below freezing out, and now the...
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