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This is my boiler. Can anyone have a guess at what might be wrong with it based on the vid? I have had 2 plumbers look at it and several new parts but still this happens pls help if you can thanku

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  • Steve Taylor Jan 08, 2013

    Just read redhase89's solution, yes what he say's is right, any air in the pipes can cause water lock, it is essentially the same as blocking the pipe with a cork. If you have good water pressure & a separate hot water system run that through the line that's connected to OUT on the boiler, until it comes out the IN line, let it run awhile, until you see no air coming out, not forgetting to fill boiler too, as these have a pump to circulate the water, though I would have thought there would be a purge air button on a system like this...

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I can't tell if it's igniting, I assume it's gas powered, can you hear the main burner light? or see the pilot light at all? If you answered yes to either, then I'd say it's the safety cut out, not having enough time to heat the sensor. See if there is a way of holding it in the start position for say 30 seconds, then release, if not then ask repair man if there is a way of adjusting the starting hold-on time, hope this helps...

Posted on Jan 08, 2013

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redhaze89
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SOURCE: I'm a new plumber. I

1. You need to fill the entire system with water before you fire it, boiler AND radiators... Then, you would normally vent as much of the trapped air in the system as you could... It's not like you are only going to fill just the boiler and then pump that water through the pipes.

There is a temp setting on the boiler, but I don't think that's a solution. Remember that the water in the system is going to begin circulating as soon as you start the boiler. So, it will start circulating when it's cold, and then gradually warm up.

Your problem is not the sudden rush of hot water, it's going to be filling the system in the first place, and getting the boiler started before the system freezes up ...

I don't really have any suggestions for you though, other than perhaps renting one of those construction heaters ... and bring the building temp up a bit. But there's certain dangers associated with them too... Carbon Monoxide for one, fire is another (if used improperly).

Just thought of something: Fill the system with glycol based anti-freeze solution that's designed for heating systems. That oughta do it...

I'm guessing there's not a functioning water heater either at this point, is there ? If there was, you could possibly rig something up to fill the system with lukewarm water, and fire it before it freezes up.

2. You don't have a lot of choice. You have to fill the system, fire the boiler & wait.
It is going to take a long time to get the system up to temperature. Instant circulation is a double edged sword. The upside is you get a little bit of heat into the water & have it moving making freezing less likely. The downside is, it's hard on the boiler with that much cold water coming back you are likely to have condensation.

Posted on Apr 22, 2009

  • 13 Answers

SOURCE: The problem is as follows

What parts were replaced?
Sounds like the thermostat or relay are faulty.

Posted on Aug 31, 2011

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1. You need to fill the entire system with water before you fire it, boiler AND radiators... Then, you would normally vent as much of the trapped air in the system as you could... It's not like you are only going to fill just the boiler and then pump that water through the pipes.

There is a temp setting on the boiler, but I don't think that's a solution. Remember that the water in the system is going to begin circulating as soon as you start the boiler. So, it will start circulating when it's cold, and then gradually warm up.

Your problem is not the sudden rush of hot water, it's going to be filling the system in the first place, and getting the boiler started before the system freezes up ...

I don't really have any suggestions for you though, other than perhaps renting one of those construction heaters ... and bring the building temp up a bit. But there's certain dangers associated with them too... Carbon Monoxide for one, fire is another (if used improperly).

Just thought of something: Fill the system with glycol based anti-freeze solution that's designed for heating systems. That oughta do it...

I'm guessing there's not a functioning water heater either at this point, is there ? If there was, you could possibly rig something up to fill the system with lukewarm water, and fire it before it freezes up.

2. You don't have a lot of choice. You have to fill the system, fire the boiler & wait.
It is going to take a long time to get the system up to temperature. Instant circulation is a double edged sword. The upside is you get a little bit of heat into the water & have it moving making freezing less likely. The downside is, it's hard on the boiler with that much cold water coming back you are likely to have condensation.

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