Jump to content


Use this Search Box to Find Appliance Repair Help Now
Need help finding your model number?
365-day return policy on all parts purchased here, even electrical parts that have been installed!


FAQs | Store | Memberships | Repair Videos | Academy | Newsletter | Beer Fund | Contact


Welcome to Appliantology.org, the Web's Premiere Appliance Repair Resource for DIYers!

The world-famous Samurai Appliance Repair Forums


You can post a question and get repair help for FREE! Click here to get started.


Already a member of the Appliantology Academy? Just sign in with your username and password in the upper right-hand corner of the screen.

 


Photo

Aquastar 125 BO flue gas sensor

troubleshooting

  • Please log in to reply
4 replies to this topic

#1 chasimoto

chasimoto

    Unsui

  • Grasshoppah
  • Pip
  • 3 posts

Posted 10 March 2013 - 08:53 PM

Anyone out there hazard a guess on this problem?

I've been through all the service bulletins for a non-working Bosch Aquastar  (AQ 125 BO), and have done all the tests I can think of, but still the pilot light won't remain lit. Thermo-couple is putting out about 25 mVDC, right in spec with what it should be, and that leaves me with only the flue gas sensor and the electromagnet assembly as possible culprits. I'm not sure how the flue gas sensor is supposed to work, but as it's sitting on the exchanger coils, I'm guessing heat either opens or closes the contacts inside, thereby making or breaking the connection from the thermo-couple to the electromagnet assembly. This unit sits dormant all winter, and has given me trouble before when getting it ready for use in the spring. At this point, nothing I do seems to be able to keep the pilot light lit, including jumpering out the suspect components (ECO, flue gas sensor).

I'm just about ready to remove the unit and scrap it. Any ideas out there?

 

Thanks in advance!

Chas



Use the Appliantology Parts Search Box to Find What You Need!
Enter your model number, part number, type of appliance, brand, or even a part description.
365-day return policy on all parts purchased here, even electrical parts that have been installed!

#2 Cactus Bob

Cactus Bob

    Senpai

  • Sublime Master of Appliantology
  • PipPipPipPip
  • 553 posts
  • Location: USA

Posted 10 March 2013 - 09:45 PM

sorry , i just saw you had already jumped the flue gas sensor , so i am out of ideas

this was an edit , sorry

Edited by Cactus Bob, 10 March 2013 - 09:53 PM.

SORRY ABOUT THE SPELLING , I FIX GREAT , I DON'T SPELL WELL

#3 Budget Appliance Repair

Budget Appliance Repair

    Sensei

  • Appliantology Fellow
  • PipPipPipPipPip
  • 4,720 posts

Posted 11 March 2013 - 05:16 AM

Have you done a basic continuity check on the safety magnet to make sure that it isn't open?


William Burk (Willie)
Willie's Budget Appliance Repair
Eureka, CA 95501

#4 jumptrout

jumptrout

    Sensei

  • Appliantology Fellow
  • PipPipPipPipPip
  • 1,379 posts
  • Location: USA
  • Flavorite Brew:Coors Light

Posted 11 March 2013 - 08:27 AM

These might help.

http://www.bosch-cli...vice-bulletins/



#5 chasimoto

chasimoto

    Unsui

  • Grasshoppah
  • Pip
  • 3 posts

Posted 11 March 2013 - 03:50 PM

OK, fellow Samurai-ista's, here was my problem(s)...

 

First, an intermittent continuity problem in one of the leads going to the flue gas sensor. The wire connector under the shrink wrap was broken, but occasionally it would make contact and work for awhile. Hence, when I jumpered it out, that didn't work cause the break was in the wire connector. I should have noticed it being a bit too flexible, but hey, they looked skookum and I didn't even suspect that would have been it. I was all set to blame it on a failed electromagnet, but not so! 

 

I also seem to have a bad flue gas sensor which if wiggled, or even breathed on, will break continuity, so it needs to be replaced too. 

 

I've got it working now, but will still go ahead and replace the thermocouple as well as the flue gas sensor so all the components and connections will be new, just to get it back up to snuff. 

 

A thorny problem that I eventually figured out...Thanks for the replies, one and all.

 

PS: My favorite beer... dang, who can say, there are some really excellent ones out there now. Lately I've been swilling my fair share of Ninkasi "Total Domination" or Re-New Ale (out of Eugene, OR) and the Pyramid Outburst is a whopping 8.6% with darn good flavor. Try em!







Also tagged with one or more of these keywords: troubleshooting

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users


FAQs | Store | Memberships | Repair Videos | Academy | Newsletter | Beer Fund | Contact


Use the Appliantology Parts Finder to Get What You Need!
Enter a model number, part number, type of appliance, brand, or even a part description.
365-day return policy on all parts purchased here, even electrical parts that have been installed!

Your Sometimes-Lucid Host:
Samurai Appliance Repair Man
"If I can't help you fix your appliance and make you 100% satisfied, I will come to your home and slice open my belly,
spilling my steaming entrails onto your floor."

The Appliance Guru | AppliancePartsResource.com | Samurai's Blog

Real Time Analytics