I have a LAARS MASCOT and it has been calibrated by a technician. Every winter it throws error 133 (no flame) . When I reset it and watch it try to start the flame goes on for 2 seconds then blows out. 3 tries and throws error 153 (no start Lockout). I am at 7072ft elevation. Does anyone know what the problem is? It has been working flawlessly all summer.