Questions tagged [combi]

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Combi Instinct 199 - hot water radiator pressure

I recently had a oopsie where I tried bleeding one of my colder radiators and I accidentally unscrewed the bleeder valve too far and it popped out. Bunch of water came out but I was able to eventually ...
matas eitmantis's user avatar
1 vote
2 answers
119 views

Can a combi boiler be damaged to the point of ruin by 'sludge' in the water?

I have a Baxi combi boiler and over the last 5 years it has had more problems than I can remember. We've had flow diverter valve failures about once a year, replaced both the hot water and main heat ...
Mr. Boy's user avatar
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1 answer
84 views

Difference between Impact vs normal drill bits for Masonary with sufficient BPM impact

So a Disclaimer - This is not a product review (so please do not misunderstand the intent) I have got a trades-grade impact drill - DeWalt DCD795 which has enough torque and impact bpm to drill ...
ha9u63a7's user avatar
  • 103
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0 answers
711 views

One of multiple zones calls for heat, but all return lines get hot

We just installed new gas combi boiler (Lochinvar NKC199N), it is working but there is one issue that I don't quite understand. We have 4 zones (4 different circulation pumps, 4 thermostats), when ...
ysok's user avatar
  • 31
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Is it okay for combi setup to be shared between all the radiators and taps in the house except the kitchen sink?

The new flat I moved into has a quirk about it's water loop I realized that when I take a shower. All the radiators immediately go cold and the showerheards heat sometimes gets low only for me to ...
Delta Oscar Uniform's user avatar
0 votes
2 answers
207 views

Is a standard 3-mode (Hammer, Drill, Screw) Combi Drill always capable of alternating direction?

I am trying to get myself a brushless+cordless Combi Drill to replace my nightmare Terratek corded drill and support my home DIY package. I don't need advice for drill, as I know it's not the right ...
ha9u63a7's user avatar
  • 103
2 votes
3 answers
415 views

Does clogged radiators increase the heating bills in a tankless combi boiler setup?

We moved to a "new" apartment and I was told by a family member that all the radiators are clogged like hell and we should get them cleaned ASAP which we never did. What makes me paranoid is ...
Delta Oscar Uniform's user avatar
1 vote
0 answers
158 views

Trying to wire a nest thermostat E in UK with 2 live wire and 2 neutrals

I live in the UK and am trying to replace a Honeywell WiFi thermostat with a Google Nest thermostat E. I have 2 3-core wires coming into my thermostat, 2 live and 2 neutral wires, 1 pair I believe are ...
Mohamed Al-Ayubi's user avatar
-1 votes
1 answer
1k views

Does my boiler try to heat water in my tank if it's already hot?

I've got a combi boiler which heats the hot water tank using the indirect method. I use Hive to control it. I'm trying to work out: if the hot water is set to on for an hour, will the boiler ...
AutoBaker's user avatar
  • 139
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1 answer
224 views

How can I figure out if a Combi Boiler will be adequate for my house?

We recently moved into our new home that currently has a Super Hot MG-100 Hydronic Boiler (installed in 1986, when the house was built). Clearly, it's done its job and in need of a replacement. We had ...
nnamerz's user avatar
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0 answers
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Valiant Boiler - 3 months old

In September I had a Valiant boiler fitted in my 2 bedroom house. It hasn’t worked properly ever since. Every time I put the heating on my pressure drops from 1.5 to 0.3 bars and I get the spanner ...
Desperately seeking a solution 's user avatar