Boiler start up problem

[Victor]

I have a 36kw gas boiler on a time clock in an outbuilding. When the the timer cuts in first thing in the morning, it fires up the boiler which runs for a few seconds and then stops, there is then a delay of a miniute or so and it tries again, the second time it runs for about 30seconds and then stops, after another delay it tries for a third time, this time it runs fine. However when the timer kicks in either later in the day or early evening the boiler fires up and runs ok on the first attempt. The service company say there is no problem with the boiler, could it be a problem with the timer or something else I have missed?

 

[topquark]

Could be a number of things, I'd hazard a guess it's temperature related (the environment the boiler is in, not the thermostat).

You could check out the programmer and ensure that all of the time slots have been correctly set. Often there are a number of on/off slots that can get overlooked when setting up the programmer.

 

[Specialist]

Sounds like maybe your Thermocouple is on it's way out & not keeping the Gas valve energised. But really a job for a good Heating engineer. Unfortunately what you find with a lot of Maintenance companies is that they're quite happy to take your money but when it comes to actually doing a repair where they're responsible for parts then thats a different matter.

 

[Richard]

Always gets me the term heating engineer! Connecting pipes - no problem, but of all the plumbers i'v worked with only a few had a good working knowlege of the electrics involved!!!

 

[Specialist]

Don't think calling themselves Pipe Monkeys would sound as Impressive Lol.

 

[Guest123]

I have a 36kw gas boiler on a time clock in an outbuilding.

Can you elaborate on the 'outbuilding' a bit i.e, detached from the house or part of it. Does it get very cold in there??

 

[Victor]

The outbuilding is attached to the house, but you have to go out of the house to get to it, and yes it does get cold, it does not freeze up, but you would not want to live out there for long.

 

[sparky3366]

mebbe a frost stat & pipe stat needed then...

 

[ian.settle1]

Had a similar problem on a Rialto 50 commercial burner, would come in in the morning at burner had locked out reset burner and it would fire later on it would not fire at all.

Got the gas engineer in turned out in the end it was the gas pressure needed adjusting.

 

[topquark]

Had a similar problem on a Rialto 50 commercial burner, would come in in the morning at burner had locked out reset burner and it would fire later on it would not fire at all.

Got the gas engineer in turned out in the end it was the gas pressure needed adjusting.

Because of the ambient temperature Ian?

 

[chris murphy]

Always gets me the term heating engineer! Connecting pipes - no problem, but of all the plumbers i'v worked with only a few had a good working knowlege of the electrics involved!!!

Most `Plumbers` will NOT know everything about the Technicalities of Heating Systems and although they might know How they want the Electrical Controls to Operate - If the Controls do NOT Operate in the correct sequence these People don`t know why and cannot check the sequence required.

There are plenty of People who think that a Heating System is just `Guess the Radiators` and Fit them with a Combi Boiler - and that as long as You can `Do` the Pipework it is `Easy` - I pity their Customers !

I am a Heating Engineer - Some of My Friends and Family think that they can just mention a few` Facts` about their Boiler which may not be working and that I could then `Diagnose` the Fault without even going to look at the Boiler . Heating System / Controls - NOT usually possible because of the multitude of `Electrical Elements` of the Modern Boiler and its Controls.


Chris

 

[chris murphy]

Don't think calling themselves Pipe Monkeys would sound as Impressive Lol.

Some `Plumbers` would not merit the term `Pipe Monkey` ! - But Qualified Plumbers / Heating Engineers as You know are Tradesmen who require a LOT of Technical Knowledge and Skill.

Chris

 

[puddle]

With regards to op,think problem is with boiler not external controls,seems boiler is stating and going through its self check process and is sensing something is not quite right,is sounds as one of the sensors itself has a problem

You do not say what boiler it is but the fact it is in a out house this time of year and problem only first thing would point to a possible damp/condensation problem in the boiler,it is not good to have electronic equipment outside in a out house,indeed as you know,delicate equipment should be removed from vans at night this time of year

I would build a insulated box around the boiler,this may well cure the problem and will increase life span of delicate components found in todays boilers

 

[Geordie Spark]

Could be a number of things, I'd hazard a guess it's temperature related (the environment the boiler is in, not the thermostat).

You could check out the programmer and ensure that all of the time slots have been correctly set. Often there are a number of on/off slots that can get overlooked when setting up the programmer.

How about as an experiment you get some sort of heater in the boiler house for a couple of nights to see if the fault is temperature related??

OK ... it's going to cost you some money in running costs for the heater, but it could save you in the end if it points you in the right direction.

 

[Deleted member 26818]

I'd get another heating company in to look at it.
It could be a number of things.
Low gas pressure, air flow sensor, dirt on the thermocouple, could even be a blockage on the exhaust.