What would cause the stove to not stop running?
The heat is turned down on both thermostats, the timer is running like it's supposed to be off on the box, but the stove runs continuously.
EFM 520 coal stove won't stop running
- nepacoal
- Member
- Posts: 1696
- Joined: Wed. Nov. 21, 2012 7:49 am
- Location: Coal Country
- Stoker Coal Boiler: Keystoker KAA-4 / "Kelly" and an EFM 520 at my in-laws
- Hand Fed Coal Boiler: Harman SF-260 - retired
- Coal Size/Type: Buck
I had a thermostat go bad and it ran continuously... Can just disconnect thermostat wires at either end to test.
- McGiever
- Member
- Posts: 10130
- Joined: Sun. May. 02, 2010 11:26 pm
- Location: Junction of PA-OH-WV
- Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
- Hand Fed Coal Boiler: BUCKET A DAY water heater
- Hand Fed Coal Stove: Warm Morning 414A
- Coal Size/Type: PEA,NUT,STOVE /ANTHRACITE
- Other Heating: Ground Source Heat Pump and some Solar
one possibility...If Timer failed in the "run cycle" nudge rotating tripper plate manually will let aquastat then regain control again..
Timer will need repaired/replaced to run in mild weather w/o having a "out-fire".
Timer will need repaired/replaced to run in mild weather w/o having a "out-fire".
Last edited by McGiever on Mon. Dec. 28, 2020 10:29 pm, edited 1 time in total.
-
- Member
- Posts: 21
- Joined: Tue. Dec. 24, 2019 9:02 am
- Location: Lansford, PA
Ok thanks for the help
- coaledsweat
- Site Moderator
- Posts: 13763
- Joined: Fri. Oct. 27, 2006 2:05 pm
- Location: Guilford, Connecticut
- Stoker Coal Boiler: Axeman Anderson 260M
- Coal Size/Type: Pea
The boiler doesn't run off the thermostat. It's runs off of the water temperature in the vessel. If it is running beyond the high setpoint it most likely is the timer or the aquastat high limit switch is bad.
- Rob R.
- Site Moderator
- Posts: 17980
- Joined: Fri. Dec. 28, 2007 4:26 pm
- Location: Chazy, NY
- Stoker Coal Boiler: EFM 520
- Hand Fed Coal Stove: Chubby Jr
It is a steam boiler. It will run indefinitely if the thermostat calls for heat and the pressurtrol doesn't trip.coaledsweat wrote: ↑Mon. Dec. 28, 2020 2:08 pmThe boiler doesn't run off the thermostat. It's runs off of the water temperature in the vessel. If it is running beyond the high setpoint it most likely is the timer or the aquastat high limit switch is bad.