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Central Heating not working... Condensate Pipe frozen ?

Infinity
Seasoned Pro
Posts: 6,153
Thanks: 266
Fixes: 3
Registered: ‎19-06-2011

Central Heating not working... Condensate Pipe frozen ?

Back in 2011, our CH didn't work one very cold night.

Advice from Service was to pour boiling water onto the external Condensate pipe, which we did, worked a treat.

We then insulated the Condensate pipe with extra thermal lagging.

No issues since.

 

Tonight, it may get as low as -15ºC elsewhere in the country, expected low of around -8ºC here

So hopefully the thermal lagging will do it's job, and we will not be deprived of CH & HW.

 

So.... if your CH & HW isn't working in the morning, it's probably down to a frozen external Condensate pipe.

 

Even so, we have heaters prepared, and kettles filled.....

 

And our Winter woolies...

 

Just hope there is no power cut !!

(But we did have a mini one a few days ago)

 

You have to feel for those unfortunate to have a prolonged Power cut.

 

3 REPLIES
Community Veteran
Posts: 2,430
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Registered: ‎04-08-2009

Re: Central Heating not working... Condensate Pipe frozen ?

If it's installed according to building regs there will be an air break in the condensate pipe before it reaches the outside world. If it does freeze up there will be no risk of the boiler tripping on backed up condensate, just a bit of a wet mess where the air break is.

Community Veteran
Posts: 2,430
Thanks: 266
Fixes: 2
Registered: ‎04-08-2009

Re: Central Heating not working... Condensate Pipe frozen ?

Like this...Screenshot_20171211-191908.png

 

 

 

Community Veteran
Posts: 5,618
Thanks: 627
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Registered: ‎21-03-2011

Re: Central Heating not working... Condensate Pipe frozen ?

Some schemes have a siphon tank where the condensate collects to accumulate a quantity sufficient to trigger the siphon. Then all of the condensate drains in one go and then the cycle repeats. This reduces the risk of freezing rather than a constant drip drip of water which is more likely to freeze.

Now Zen, but a +Net residue.