How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Phil Your Own Question

Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5603
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
23932409
Type Your HVAC Question Here...
Phil is online now
A new question is answered every 9 seconds

I have a Quietside DPW-199a used for heat and domestic HW.

Customer Question

I have a Quietside DPW-199a used for heat and domestic HW. It was installed 2 months ago. A week after installation I started getting A6 Failure to Ignite errors - a couple of times/week. The manufacturer rep looked at it and said it was installed correctly, however it needed a larger regulator at the meter. This was done by the gas company and the A6 errors stopped for a month. However, now they're back. He's been back a few times - tweaked this and that but no progress. After it fails, just toggling the power starts it right back up. At this point Quietside isn't being very responsive. Current thinking is its the main board but that's just a guess.
Submitted: 2 years ago.
Category: HVAC
Expert:  Phil replied 2 years ago.

Phil :

All work to be done by licensed professional. WE KEEP GOING UNTIL YOU HAVE THE INFORMATION YOU NEED, I come and go. This is step ONE.

Phil :

Hello

Phil :

Failure to ignite can be caused by any of the following or a combination of these.

Phil :

- Gas pressure a bit too high or too low

Phil :

- Pilot/ main burner flame not impinging on the flame sensor rod directly enough.

Phil :

- Lose wire connections in the control circuit

Phil :

With a new boiler, and new parts, it is most likely that the gas pressure too high causing the burner flame to lift off of the burner head at times...when that happens the flame sensor will not be able to its job of leaking electrical current back through the flame to ground...and will shut the gas valve off and lock the system out.

Phil :

OR... the gas pressure is set a bit too low, and the burner flame is not impinging reliably on the flame sensor rod..so it fails to detect the flame occasionally and shuts the gas valve down.

Phil :

but since this was already apparently known and these pressures adjusted so frequently and you still have the problem... we must look at the electrical issues.

Phil :

This could be a control card but thats not a common control card failure mode. stray electrical currents in the house neutral or ground wiring can cause such anomalies by interfering with the systems electronics.

Phil :

Intermittent problems like this can be exceedingly hard to detect.

Phil :

Sometimes all that can be done is to wait until it gets worse, and the problem more obvious or something fails entirely... then the fault is detectable.

Phil :

Sometimes bending the flame detector rod a bit so it is more directly in the burner flame will solve the problem.

Phil :

Phil

Customer:

Phil,

Customer:

This unit attempts to refire 3 times before it gives the error code. However, if I simply toggle the power it will start right up. I've done this immediately after an A6 code. Any ideas why it would start then but not automatically?

Phil :

Hello again

Phil :

The three attempts to fire before lock out is built into the controls.

Phil :

when you toggle it on and off you are simply rebooting the controls before they have a chance to try the ignition three times and lock out

Phil :

You might ask why it starts right up after you toggle it? Good question

Customer:

I meant I toggled the power after the three attempts - then it started up.

Phil :

toggling it resets the controls

Phil :

why it then starts on the first try is a good question.

Customer:

So you think it's a control issue?

Phil :

it gets into the vagaries of the electronics

Phil :

it is an electronics controls issue

Phil :

but since the flame is part of of the electronics circuit itself, its also a flame issue

Customer:

Some more info: it typically fails when calling for domestic HW. IS that a clue?

Phil :

it could be that toggling it, allows the control card to shut down long enough to bleed electrons off of its micro circuits so they behave differently when the card is powered back up again

Phil :

its something along those lines

Phil :

if it fails when calling of DHW do you have to toggle it to get it to fire.

Customer:

OK, thanks. I think you're right in that I'll have to wait until it gets worse before it gets better.

Customer:

Same as I mentioned. It tries 3 times, gives an A6, then I toggle the power and it starts.

Phil :

The time to press this issue is while its still in warranty, Now is the time to demand a fix, or something like a five year parts and labor extended warranty

Customer:

Roger that.

Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5603
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Phil and other HVAC Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
< Last | Next >
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • gotoman for ac

    HVAC Technician

    Satisfied Customers:

    4657
    51 years of experience install design and repair of all makes and models of AC
< Last | Next >
  • http://ww2.justanswer.com/uploads/SE/ServiceTechRus/2012-6-7_2119_056.64x64.JPG gotoman for ac's Avatar

    gotoman for ac

    HVAC Technician

    Satisfied Customers:

    4657
    51 years of experience install design and repair of all makes and models of AC
  • http://ww2.justanswer.com/uploads/AL/alumalite/2012-5-10_234018_shutterstock506249951forJA500.64x64.jpg Phil's Avatar

    Phil

    Mechanical Engineer

    Satisfied Customers:

    3888
    Retired HVAC/ Electrical & Boiler contractor. Industrial
  • http://ww2.justanswer.com/uploads/skibum0101/2008-12-16_015819_just_answer.jpg Rick Mather's Avatar

    Rick Mather

    HVAC Technician

    Satisfied Customers:

    3132
    35 years experience, HVAC
  • http://ww2.justanswer.com/uploads/RY/Rygis20/2011-5-7_3143_DSC5324.64x64.JPG Matthew's Avatar

    Matthew

    HVAC Technician

    Satisfied Customers:

    1994
    14 years experience in the HVAC field of service, installation, Manual J & D calculations
  • http://ww2.justanswer.com/uploads/KE/kentguidry/2011-9-26_214316_0059.64x64.jpg Kenton Guidry's Avatar

    Kenton Guidry

    HVAC Technician

    Satisfied Customers:

    962
    12 years install/service experience.
  • http://ww2.justanswer.com/uploads/solarman1947/2009-12-13_223915_phpkKBcXq_c2PM.jpg Rick Ridley's Avatar

    Rick Ridley

    UK Heating Engineer

    Satisfied Customers:

    871
    Retired But have had 30 years on the tools, Ex CORGI
  • http://ww2.justanswer.com/uploads/Ironheadfan/2009-12-18_222416_pump_005.jpg Tom's Avatar

    Tom

    HVAC Technician

    Satisfied Customers:

    770
    16+yrs HVAC/R service. Residential Commerical Industrial