Question about Air Conditioners

Open Question

We have a vaillant combi boiler model 824 plus, it is hit and miss if it fires up for hot water.The pump runs the fan runs but no flame. when it doesnt fire the diagnostics on the front of the boiler show S13. Can you help

Posted by on

6 Suggested Answers

zeusfaber
  • 247 Answers

SOURCE: Vaillant Ecotec combi boiler -

David,

The fact that you're getting a little burst of domestic hot water suggests that the boiler is capable of circulating hot primary loop water through the heat exchanger, but doesn't necessarily do so when it needs to.

What seems to be lacking is a recognition that domestic hot water is now being drawn off, and that the boiler needs to fire up and divert the primary flow through the heat exchanger.

A good place to start might be the flow switch (usually in the bottom of the boiler, where the cold water supply comes in) or the electrical connections to it.

A.

Posted on Oct 07, 2008

  • 1 Answer

SOURCE: hi,i have a vaillant turbomax

I had this. Open up the main case, take the second inner case front off to expose the boiler.

Clean the thermocouple which detects the flame being lit with some steel wool held with needle nose pliers. It will be all sooty and will turn off the gas as a safety precaution if it does not detect heat fast enough.

Don't listen to the gas man who will say "needs a new circuit board mate" as this is usually a stock response.

Posted on Jan 05, 2009

  • 13 Answers

SOURCE: f20 error on vaillant eco28

F20 is a flow sensor error. Can be due to a defective sensor/ not correctly fitted, or you may have poor circulation, a big difference in flow and return temperatures, can sometimes make the boiler think it has a defective sensor, check good circulation through system, or if you have thermostatic radaiators valves on every single radiator, take 1 head off, as if you dont have a bypass fitted, it needs a radiator as a bypass circuit

Posted on Mar 03, 2009

  • 30 Answers

SOURCE: central heating boiler problem

this is probably a faulty diverter valve. more info needed

Posted on Mar 26, 2009

  • 30 Answers

SOURCE: Vaillant combi boiler problem

when the tap is turned on and the water light on the boiler doesn't this means the diverter valve is not operating it could be down to low water pressure in the house this can be checked at the cold tap in the kitchen. if there is plenty of pressure then it could be the diagphram in the diverter valve is worn or split. the diagphram is only a few pounds but it depends on the engineer you get as to how much money he wants to fit it.
the egg timer symbol (or two pyramids together) is an ignition indicator turn off and on again to see if it will fire with the tap running. reset the boiler with the lower right hand control knob.

Posted on Mar 26, 2009

  • 1 Answer

SOURCE: got a Alpha HE CB33

Problem is normally the hot water flow switch -

Posted on Jan 11, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Vaillant aqua plus combination boiler


First off, I'm not familiar with this particular boiler. I'm in the USA. I believe this is manufactured in the UK and may not be distributed here.
Second, and are you sure you needed to replace the blower in the first place?

Those questions really need to be answered before making any accurate remote diagnostics. This is a pretty complex piece of equipment with costly replacement parts. Some diagnostic and/or service work should be left up to a professional in your area if you're really not sure of what you're doing.

We all (or most of us) like to save money by doing our own repairs. If you feel confident about working on this further you can go to www.vaillant.co.uk to get manuals and service info online. This info will do you much more good than my guesses will. This unit has a diagnostic/control board that will display most faults if you know how to use it. I looked at some of the info online. They have pretty good stuff available to you if you know how to use it.

After all saying that, it "could" be the pressure switch not closing after the fan starts. You didn't say whether the new fan is starting or not. On a call for heat (or hot water) the fan starts (controlled by the main control board), the pressure switch proves the fan is running (and venting combustion gasses out of your home), it most likely has to prove water flow. If all the proving is confirmed, the ignition sequence will begin.....ignition, prove ignition, main gas valve opens, heats water, so on and so forth......

Now, if you still feel confident to work on this boiler, go to Vaillant's web site and read the manual(s). If you're not confident, call the heating man in your area. Just be careful with gas, electricity and hot water!!

I wish I could have given you more info to actually fix your problem, but I need more info as to why you changed the combustion blower to begin with. What WAS it doing? what IS it doing NOW and so on....

Good Luck to you! Let me know what you find out.

Bob
lainemech

Mar 18, 2014 | Air Conditioners

1 Answer

Hi can anybody help,i have a vaillant combi boiler and i cannot turn the heating off on the radiators can anbody help cheers!


If you they won't go off when your timer is off. There's a possibility it's clock keeping it on although its turned off, which is fairly rare. However depending in which model of Vaillant you have, if your boiler has a hot water pre-heat on it. Some models which have this the diverter was prone for sticking thus leaving the port for the radiators open when in hot water mode.

Oct 03, 2013 | Air Conditioners

2 Answers

A have a vaillant ecotec boiler and when it fires up the fan is very noisy is this right


most likely no. there might be a obstruction in the blades, dirty filter, the motor might have a bad berring , the fan blades might have bent and now are touching the housing prob should call a trained tech boilers aint no joke

Aug 06, 2011 | Air Conditioners

1 Answer

Britony 80 combi boiler G31 propane, gas flow rate =0.124877 cubic meters per hour, inlet pressure 37mbar, room sealed flu Manufactures recommended Co2 & NFGT unknown, cold water from hot tap when...


You gave a good description of the boiler--
now we need to hear the clues you have observed, as it fires (or fails to fire-- or what?)

Or as the water flow-- or doesn't flow?
As the cold water enters-- what does the flame do?
And does the flow rate reduce as the flow gets to the divert er valve?

How old is the boiler?-- and have we been using HARD water?
(Any water softener in the circuit to remove calcium and magnesium, etc.?)
Do you suspect a scaling problem in the interior parts?
If so-- can you circuit an acid thru the innards, to clean up the scale?

Please comment on what happens when water and gas flow-- so we can help you get to the next step.

Mack B

Jan 17, 2011 | Air Conditioners

1 Answer

Clock on comi boiler


it may be the preheat setting on the boiler for the hot water circuit. do the radiators get hot when the boiler fires up with the time clock off ? if not then there is nothing to worry about if it is only on for a short time.

Jan 04, 2009 | Air Conditioners

1 Answer

Vaillant combi boiler problem


when the tap is turned on and the water light on the boiler doesn't this means the diverter valve is not operating it could be down to low water pressure in the house this can be checked at the cold tap in the kitchen. if there is plenty of pressure then it could be the diagphram in the diverter valve is worn or split. the diagphram is only a few pounds but it depends on the engineer you get as to how much money he wants to fit it.
the egg timer symbol (or two pyramids together) is an ignition indicator turn off and on again to see if it will fire with the tap running. reset the boiler with the lower right hand control knob.

Dec 31, 2008 | Air Conditioners

1 Answer

Thermo Compact Vaillant Boiler


the thermocompact is a non-condensing model, and should be o.k to fix, you do not need a cylinder as is a combi model and would provide hot water on demand!

Dec 02, 2008 | Air Conditioners

2 Answers

Hi,i have a vaillant turbomax combi boiler,the radiator side is working well but when running hot tap the boiler kicks in for about 5 seconds ,hot water starts to flow then boiler cuts out,water runs cold...


Which turbomax, as there a two different models. The more modern one, with the brass CPL diverter valve, located at the front left of the boiler, was very prone sticking & jamming, this would restrict flow through the hot water circuit in the boiler, and cause cycling. Vaillant actually modified the diverter. You can identify, if it is the old type, as there is a very small hole in the middle of the diverter on the old ones, probable no more than 1mm-2mm wide. The modfied one, is much bigger approx 5mm wide. If old type, replace as this usally sorts the problem

Nov 23, 2008 | Air Conditioners

1 Answer

Vaillant Ecotec combi boiler - radiators working but no hot water flow to taps


David,

The fact that you're getting a little burst of domestic hot water suggests that the boiler is capable of circulating hot primary loop water through the heat exchanger, but doesn't necessarily do so when it needs to.

What seems to be lacking is a recognition that domestic hot water is now being drawn off, and that the boiler needs to fire up and divert the primary flow through the heat exchanger.

A good place to start might be the flow switch (usually in the bottom of the boiler, where the cold water supply comes in) or the electrical connections to it.

A.

Oct 05, 2008 | Air Conditioners

Not finding what you are looking for?
Air Conditioners Logo

Related Topics:

71 people viewed this question

Ask a Question

Usually answered in minutes!

Top Air Conditioners Experts

Dan Webster
Dan Webster

Level 3 Expert

8147 Answers

Bill Long

Level 3 Expert

577 Answers

Tim Whalen

Level 3 Expert

3056 Answers

Are you an Air Conditioner Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...