Heat on but off on boiler

[jaydebruyne]

So I came home the other day to find my rads were hot. Room stat was off. Vaillant ecotec pro combi set to 'on' for heating.

This morning I turned the heating off at the boiler and again, I came home to hot rads.

Dodgy pcb on the boiler?

 

[Alex Knight]

Frost stat kicking in ?

 

[tamz]

What type stat

 

[jaydebruyne]

That crossed my mind but didn't know if it had one :/

 

[jaydebruyne]

What type stat

It's a Drayton standard room stat

 

[jaydebruyne]

Frost stat kicking in ?

Besides, doesn't the frost stat just keep the temp above freezing rather than switch on the heating to full temperature??

 

[Rabbitman]

If external controls have been ruled out, then I'd go for a sticking diverter valve with appliance set for pre heat/comfort

 

[jaydebruyne]

If external controls have been ruled out, then I'd go for a sticking diverter valve with appliance set for pre heat/comfort

Wouldn't that cause me not to have any hot water though?

 

[Rabbitman]

You'd have hot water of sorts, which Eco tech do you have original or second generation

 

[Rabbitman]

Should it be the second generation ecotec then the in built frost would only take the appliance to 35*c

 

[jaydebruyne]

You'd have hot water of sorts, which Eco tech do you have original or second generation

Not sure I'd have to have a look tomorrow. Even if the diverter valve was stuck, wouldn't there have to be a demand for heat from the external controls? As the room stat was off, as was the heating setting knob on the boiler. Or does the fact the the valve in that position send a signal to the pcb and call for heat?

 

[Rabbitman]

Pre heat/warm start dosn't require a demand of sorts, it's looking more to maintain a temperature....... And don't get me wrong you may have a faulty pcb, but in all the years of messing around with vaillant's ive never changed a board for that reason........ But there's always a first time and as my old college tutor said,every days a school day And besides access to the status codes can tell you a multitude of of information

 

[jaydebruyne]

Pre heat/warm start dosn't require a demand of sorts, it's looking more to maintain a temperature....... And don't get me wrong you may have a faulty pcb, but in all the years of messing around with vaillant's ive never changed a board for that reason........ But there's always a first time and as my old college tutor said,every days a school day And besides access to the status codes can tell you a multitude of of information

There wasn't a status code on there, just the temperature :/ I'm going to leave it on again when I go out tonight, it's bloody freezing so maybe it'll happen again and I can get some more info ... Cheers for all the help rabbitman and everyday is definitely a school day for me!!!

 

[kris]

Has that boiler have a pre heat function ( with sticky diverter ) , or faulty clock or frost stat kicking in as bloody balltic ,

 

[kris]

Some drayton room stats have a minimum temp setting built in , couldve dropped below said temp,

 

[jase158]

Weather compensation??

 

[jaydebruyne]

Think I'll read the manual for boiler and room stat and see what they say

 

[Rabbitman]

**Inappropriate advice for open forum **

 

[Ermintrude]

Rabbit. That advice means the bloke needs to remove combustion door. Not good idea to let DIYers lose !

 

[Rabbitman]

Oh dear that was never my intention, considered myself slapped, although information provided is clearly marked in the MI instructions

 

[LPC]

It's pretty basic stuff. You've obviously got call when there shouldn't be. It's very likely to be your timer is borked and continually calling.

 

[Rabbitman]

Hope you get it sorted jaydebruyne , I'm going back to skulking in the background until i get the hang of the forum rules lol

 

[jaydebruyne]

Rabbit. That advice means the bloke needs to remove combustion door. Not good idea to let DIYers lose !

DIYer... That's a punch in the guts. I might be learning the trade but I think I deserve more than a DIY status haha

 

[Ermintrude]

Sorry . Gas gets discussed in the private bit. Or arms

 

[newcastle phill]

Did you get email ermy