I have a four year old Quadra Fire Santa Fe that's not re-starting when the thermostat calls for heat. I have had this problem on occasion since day 1, and the frequency has increased to the point that the stove simply isn't usable. It's well maintained, cleaned often, professionally serviced twice a year (my tech hasn't been able to diagnose the cause), etc. I've read through a bunch of posts here to try and figure this out, and have checked off some of the common causes: Checked the plate under the burn pot to ensure it's not loose Removed the vacuum hose and blew it out with compressed air Removed and re-seated all electronic connections Have replaced the thermo-coupler this year When I plug in the stove and turn the thermostat for heat, I get the following: When I plug in the stove, the combustion blower comes on When I click on the thermostat, I hear the click from the stove and the read light indicating call for heat comes on At this point, sometimes I get the initial load of pellets dropping Sometimes, I have to open the door and drop an initial load of pellets in – upon closing the door the pellets begin to drop Sometimes, the pellets do not drop until I hit the reset button Pellets ignite, and I quickly get a green light indicating good thermo coupler voltage – pellets begin to drop. Within a few moments, green light changes to solid red – shortly thereafter, pellets stop feeding and stove shuts down (whether or not desired temp has been reached). Combustion fan and circulation fan continue to run till stove cools down – thermostat is still calling for heat (red light still on), but the combustion fan never comes back on and the stove never re-starts As I noted above, have had this happen infrequently and intermittently since day 1, and keeping the stove clean and empty of ash build up seemed to keep it working well... until this year. Welcome any feedback that will help pinpoint the root case so I'm not paying a service tech to try random solutions (like a new thermo coupler) that don't fix the problem. Thanks in advance for any help you can offer.