Boiler stopped working

Frankbig23

I have a crown gas spark fired steam boiler. Was installed maybe 3 years ago. Got home from work and it wasnt on. Jumped the thermostat didnt kick on. I cleaned the low water probe it wasnt really dirty. I took the pressurtrol off and blew out the pig tail then i jumped the trol still nothing. Damper is open and every 15 mins i see the led come on for the cycle guard lwco intermittent test. Im thinking there must be an electric issue any advice on where to start? 

pedmec

Check the draft hood spill switch or flame roll out. Most likely the spill switch as you stated the damper is open so those two devices would be in series after the damper end switch. Hard to believe you would have a plugged HX after 2-1/2 years so i'm leaning towards the spill switch. If the spill switch has failed you need to find the cause. It's a safety device. You might have animals nesting on top of your chimney, dead birds at the base, etc. spill switch should be re-settable by pressing the button in the middle

WMno57

Any lights on the Crown control board?

Frankbig23

pedmec said:

Check the draft hood spill switch or flame roll out. Most likely the spill switch as you stated the damper is open so those two devices would be in series after the damper end switch. Hard to believe you would have a plugged HX after 2-1/2 years so i'm leaning towards the spill switch. If the spill switch has failed you need to find the cause. It's a safety device. You might have animals nesting on top of your chimney, dead birds at the base, etc. spill switch should be re-settable by pressing the button in the middle

So only reason i dont think its a nest or anything is i have a 2 family house with seperate hot water boiler and my tenants boiler has no issues . Is the draft hood spill switch the little round sensor near the end of the air pipe? Theres also a littlr resitor lokking thing i was getting 14 ohms resistance across i dont see anything with a button for reset

Frankbig23

WMno57 said:

Any lights on the Crown control board?

I dont have any led panel only leds are on the cycle guard lwco just one for intermittent  test and low water

Frankbig23

I had to go to work when im home ill get pictures

Frankbig23

This looks to be the same set up i have CROWN BOILER

Crown Boiler BSI172ENP 172 MBH Gas-Fired Fully Assembled Steam Boiler

109A_5

Hello @Frankbig23,
Probably something in the Yellow boxes. A Multi-meter would help.

Damper End Switch.
FRS - Flame Roll Out Switch.
BVS - Blocked Vent Switch.
Ignition Module.



https://www.velocityboilerworks.com/documents/bermuda_installation_manual_2012.pdf