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Old 07-20-2004, 01:47 AM   #1
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Combi boiler reset


Hi there.

I'm wondering if someone might be able to help me out with a quick query. I had to remove a radiator from my bathroom however now that I've turned the water back on, the combi boiler does not start up - either for the central heating or hot water supply.

Is there something that I need to adjust/bleed etc?
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Old 08-10-2004, 05:21 PM   #2
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Combi boiler reset


Shane,

Did you drain the water heater?
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Old 08-11-2004, 01:37 AM   #3
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Combi boiler reset


Yep.

I drained the system and removed the radiator. After doing what I needed to I replaced the radiator, filled the system and bled the radiators.

Still no luck.

Cheers

Shane
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Old 08-13-2004, 05:14 PM   #4
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Combi boiler reset


Not an expert on this but I did drain a hotwater system once and she didn't fill up properly and within a few seconds she burnt out the element.
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Old 08-13-2004, 09:14 PM   #5
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Combi boiler reset


Is this a gas or oil fired boiler? Many of these units have a low water sensing probe. If it is a steam system (one pipe to radiators think it would be at the middle to down to about a third of the level and hot water (two pipe to radiators system) it would probably be at the top third. This probe is many times a single wire probe that can build up with minerals preventing the water to conduct for the sensing voltage (not alowing the unit fire up for safety). I used to work on industrial cooking equipment and some heating it has been years and I believe my memory on this is correct but if not I hope it can steer you in a possible right direction. If it has a probe and it is build up with deposits start with cleaning it rub it's length with somthing like a scotch bright pad until you see metal shining threw. get a least half the surface clean to metal and it should sense ok.
Good Luck

(DON'T BYPASS leval probes, if the boiler runs low on water it can go BOOM)
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Old 08-21-2004, 12:42 PM   #6
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Combi boiler reset


Check the water pressure (about 1 bar)
Check the overheat thermostat (hand book)
Check the pump turns (hand book)
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Old 12-29-2006, 06:24 AM   #7
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Combi boiler reset


did you bleed the pump when you bled rads.the pump is in the boiler has a big screw cover on the front of it open this when switched on put a screwdriver in and check its turning leave open for a few mins this will expell air from boiler then shut and see how you go
cheers
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