Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.

If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Need to contact us? Visit

HTP Elite 1st Gen FO6, then FO3, replaced return sensor, still F03

wcs5050wcs5050 Posts: 126Member
edited May 11 in THE MAIN WALL
Went from erratic operation to none. Resistance across original return thermister dancing but seems ok. Anyone have any ideas. Primary pump operational.


  • wcs5050wcs5050 Posts: 126Member
    Skip that... Went back for followup eval... Not obvious, but flue gas temperature sensor under upper cover snapped and was sending vapor and moisture over upper control board. Integrated relay on board faulted.
  • TimcoTimco Posts: 2,915Member

    We have a TSB regarding this issue, and if you email us at [email protected] or call us at 800-323-9651 we can send you the entire kit needed (7450P-901) to replace the exhaust flue assembly and the flue temp sensor. Sorry to hear you had this issue. I only check in every 2-3 days so I missed this post. Tim
    Technical Support Manager, HTP Comfort Solutions.
  • Le JohnLe John Posts: 129Member
    Hats off to HTP and @Timco for providing Excellent Customer Service!
Sign In or Register to comment.


It looks like you're new here. If you want to get involved, click one of these buttons!