Vacuum Switch- Ardisam/Serenity Castle HPS10/ HPS10IC- replaces 720238- 720073

Vacuum switch for Ardisam Castle HPS10, HPS10IC, and Serenity wood pellet stove. Part # 720073 replaces 720238. No longer comes with top part. The vacuum  switch is a safety switch that shuts the pellet stove down if the combustion (Exhaust) blower fails. If your pellet stove starts up then stops feeding pellets after the start cycle is over, then the vacuum switch is bad or the vacuum line is clogged with ash.  Also, if the auger motor does not turn you may have a bad vacuum switch.