Dunkirk boilers continually starting and stopping

Reply

  #1  
Old 04-30-12, 06:58 AM
Member
Thread Starter
Join Date: Apr 2012
Posts: 3
Received 0 Votes on 0 Posts
Dunkirk boilers continually starting and stopping

We have two Dunkirk boilers. (Model number not handy at the moment)
Obviously a multi-zoned home with Taco pumps etc.

Recently boiler #1 began trying to start, for about 4 seconds, and stops.
It waits for maybe 2 minutes and does the same thing again.

Of the five status lights only the power one is on. Never gets to the second light which is 'Purge' I believe. Boiler #2 is fine.

After much reading and looking at blogs we decided to follow the safety steps, turning things off etc., to clean the clear plastic tubing on the bottom of the boiler that have to do with exhaust etc.

That worked for about three hours. All the status lights went through their proper sequence according to the manuals etc. Then the problem reappeared.

So are we onto something here? Any suggestions?

Thanks!!
 

Last edited by rman57; 04-30-12 at 08:54 AM.
Sponsored Links
  #2  
Old 04-30-12, 04:25 PM
NJT's Avatar
NJT
NJT is offline
Member
Join Date: Oct 2006
Location: USA
Posts: 23,539
Received 3 Votes on 2 Posts
Maybe onto something... find the model numbers.
 
  #3  
Old 05-03-12, 11:40 AM
Member
Thread Starter
Join Date: Apr 2012
Posts: 3
Received 0 Votes on 0 Posts
Dunkirk Model numbers are...

From the service tag on the unit:
- Q90-100

To reiterate boiler #1 continuously tries to start but never does.

Symptoms:
- Hear the unit whine a little for about 4 seconds and stops
- Two minutes later it does the same
- Status lights, only the power light stays on, the other four never even flicker.
Boiler #2 is fine.

We cleaned the clear plastic tubes at the bottom of the unit.
That worked for about 3 hours and started the same sequence again.

Thoughts / suggestions?

Thanks!
 
  #4  
Old 05-04-12, 11:15 AM
NJT's Avatar
NJT
NJT is offline
Member
Join Date: Oct 2006
Location: USA
Posts: 23,539
Received 3 Votes on 2 Posts
We cleaned the clear plastic tubes at the bottom of the unit.
Were they clogged/blocked before cleaning?

Is the 'whine' that you hear the same sound that #2 makes when it starts?

You will never get any lights if the draft inducer doesn't come up to speed and prove combustion air, so the problem is likely in that area... but I thought it would 'lockout' and flash the light after a certain number of tries or a set time.

It's also possible that the control is bad...
 
  #5  
Old 05-14-12, 07:40 AM
Member
Thread Starter
Join Date: Apr 2012
Posts: 3
Received 0 Votes on 0 Posts
Yes it's the same whine as what boiler #2 makes when it starts.

Found out there's possibly more cleaning to do. Once that's done if the problem remains we'll call the local expert.

Thanks!
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: