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This weekend I went to look at a down boiler that I installed 17 years ago. I probably should of sent him to the yellow pages, but hes now old and retired (I'm just old) and I thought I'd just take a look at it for him.

It a valliant, 100,000 in. its got a honeywell 586 e intermittant piolet. On a call for heat the piolet would light, no problem, but the main flame wouldnt. A little bit of wiggleing , tapping and a couple of choise words and she fired right up. An even 12 trys it failed once more.

Now he didnt have the papers from the boiler anymore. If I have anything on these controls, its buried upstaires in the barn in my "archives".

Can anyone tell me what the probale causes of this are? Could it be a simple as a dirty sensor or should I be looking at new controls.

He wants a ballpark on a hi efficent boiler, but hes got to save up for it.

Any ideas will be aprreciated.

thank you



  • I assume you mean

    a Honeywell S86E module. I have a procedure for checking that system out if you e-mail me I will send it to you for free.
  • corey_3
    corey_3 Member Posts: 15

    if its any help i have the original manual for a vaillant GA 100 boiler.... I can scan whatever section you like and e-mail if that may help
  • BillW@honeywell
    BillW@honeywell Member Posts: 1,099
    It probably is an S86 spark module.

    Go to www.customer.honeywell.com, look on the lower right hand corner of the screen, click on literature and type in S86 for a tech sheet to download and print out or view on screen. No charge and no password required.
  • pipewrench
    pipewrench Member Posts: 3
    Thank you.....

    Thank you Tim, corey and Bill.

    Tim I emailed you, Bill Ill go theer as soon as I post this, Corey, thanks for the offer, with bill and timmys info i shouldnt need it but many thanks just the same. must still be lighting fine as i have not recieved any follow up calls. But i will be returning to clean the fire box and anything else that this info sheds light on.

    Thanks again!

This discussion has been closed.