Peerless Boiler not heating and has no flame

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Old 04-01-18, 07:14 PM
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Peerless Boiler not heating and has no flame

I have a Peerless boiler and today woke up to it not heating the water. The water definitely feels like it is circulating through the pipes, but the water temp isn't getting over 60 degrees. It doesn't seem to fire up when the thermostat is set. What can I check myself and how do I check it before I have a tech come out and look at it?
 
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Old 04-01-18, 08:49 PM
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It can be many things. If you have the aid of a second person..... turn the heat off at the thermostat and see if the pump stops. If it does.... the thermostat is ok.

One typical problem is the flue vent doesn't fully open. It's the round black thing in the exhaust line. See if it has a manual operation lever and try opening it.

Small pictures have little definition so a full size one of the burner area would be helpful as well as posting the model number for the boiler.
 
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Old 04-01-18, 09:40 PM
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I already checked the vent and it seems to be working properly and the pump does come on and off. I am not sure of the model number. Is it the boiler number on the plate or where can I find that at? Attached should be links to larger pics. Thanks for the help.

https://photos.app.goo.gl/Z4XzmSZMST0CSisg2
https://photos.app.goo.gl/Q4KtzeSoQ8BVZqm52
https://photos.app.goo.gl/UDUlPKqsmw8bWa4g2

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Last edited by PJmax; 04-01-18 at 10:37 PM.
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Old 04-01-18, 10:43 PM
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That uses an S8910U ignition module. I've labeled your picture with blue circles. There should be 24vac there in order for the boiler to fire. The 24v wire will go thru safety switches and probably to an aquastat. You will need to trace that wire to find out what's open. There should be a wiring diagram on the service door with that wiring.

Manual for the ignition module. Explains the fault light too.
Honeywell/S8910U_TECH_SHEET.pdf
 
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Old 04-02-18, 08:05 AM
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Just to make sure I am clear, it sounds like it probably is the ignitor since the vent and pump are working fine. Looking at the diagram and boiler pic below, the ignitor comes from the two wire nuts that lead to the ignitor. So I would just unscrew the ignitor from the bracket, slide it out, wire the new one and screw it back into place? Obviously with power off. The sticker on the ignitor says Model 271w. So I can find that model or it seems there are universal ignitors that would work with this model. Thanks again for the help.

https://photos.app.goo.gl/TSCqUS8yf6BTnQsC3
 
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Old 04-02-18, 10:51 AM
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When that ignition module gets its 24vac it operates. That voltage must be checked before replacing any parts.

The vent damper and pump are not controlled by this module. This is only the ignition module.
 
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