HarveyWhite Report post Posted November 27, 2016 My zone 1&2 fans come on and has cold air. Hot water fine and zone three has hot air, the control has no red lights on all pumps running. Any one ever have this issue? Share this post Link to post Share on other sites
rpelatt Report post Posted November 27, 2016 Just experienced the same thing. On another forum was told that the AH valves will stick occasionally (from lack of use) and to tap lightly on the side of each valve. This should loosen them up. We needed to get going so just used dash heat and got home last night. Intend to try it today. Share this post Link to post Share on other sites
five Report post Posted November 28, 2016 Here's a link to the AH forum: http://www.forum.rvhydronicheaterrepair.com/ Share this post Link to post Share on other sites
