I recently purchased an englander 55-shssp01 from a friend of mine that’s contacted the repair line a few times and replaced parts with no help. So he gave up on it lol. The issue seems to be after about 15 minutes, the exhaust blower seems to kick down and the flame becomes lazy. Pressing the off button kicks blower back into high, and press on again and fire comes back as it should. But this happens every 15 minutes. My friend was told to replace the vacuum switch and the exhaust blower motor but that did not fix the issue. Any help is appreciated.