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Buderus GB142 - not circulating to baseboards/indirect HW fine
Sorry in advance if this is an annoying amateur question ( I am one!) I have Buderus GB142 with 3 zones + indirect HW. Indirect HW works fine. Turned on heat and no circulation to baseboard heat zones.
Tried the following:
1. Code H 7: First shows low water pressure so I added water via the regulator - brought it 15#. No change.
2. Assumed air in system and bled each zone. Little sign of "major air" some small bubbles. Still no change but it brought up code "OA 81" which went away. That apparently is a message for - "you've messed with me so I'm taking a break for a few minutes."
3. Question #1 might be - I am bleeding correctly? I'm shutting off the supply and return valves to all the zones except the supply valve to the zone I'm bleeding. I then hooked up a hose to the drain valve and let it run. Thermostat is on so it should be calling for the circulator pump to run.
Anyway, I'm going to call my plumber/installer for a regular service check...but it's Sunday now, and it's cold and I figured if I can DIY it, my family would be pleased.
Thanks for your help and any ideas.