Heating woes - Atwood Confort 3

Discussion in 'The Beginner' started by jimothy, Jan 21, 2013.

  1. jimothy

    jimothy Read Only Funster

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    Hey ho

    I've got a problem with my Atwood Confort 3 water heater and blown air heating.

    It has stopped working.

    The symptoms are: turn on (the water or the heating, same thing happens either way), green light comes on, sounds like it fires, stays on for a bit, then it shuts off, and red light comes on.

    Any ideas what I should check?


    I used to get a similar problem last year when it wouldn't fire when running on leisure batteries, but a new pair of batteries solved that; and it had been running fine up until a couple of weeks ago.


    Merci beaucoup.

    Jamie.
     
  2. pablomc

    pablomc Funster Life Member

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    Just a quick thought if you have snow. Make sure none is blocking the flue.
     
  3. jimothy

    jimothy Read Only Funster

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    It stopped working long before the snow arrived. Dec 14 was the last trip we took and discovered the lack of heating.

    Will check the flue for blockage though.
     
  4. scotjimland

    scotjimland Funster Life Member

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    Atwood heater service manual with fault finding .. pfd download

    http://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&ved=0CFgQFjAE&url=http%3A%2F%2Fmanuals.adventurerv.net%2FAtwood-Water-Heater-Service.pdf&ei=12H9UPz-GYO90QW1sIHgDA&usg=AFQjCNHc9VrIoIurYdGDUvwVPYSSdDiJzA&sig2=vaFi1t-GpBbF9h--_QG_7g

    CAUSE SOLUTION
    WATER HEATER LOCK OUT - SPARK PRESENT BUT NO GAS
    Gas pressure incorrect ------------------------------------------Set inlet pressure at a minimum 11˝ W.C. with two or more gas
    appliances running
    Low voltage--------------------------------------------------------Correct power supply - 10.5 VDC minimum
    Blocked main burner tube --------------------------------------Clean burner tube
    Blocked main burner orifice ------------------------------------Clean or replace orifice
    Loose wires on E.C.O. --------------------------------------------Secure wire connections
    Loose wire connections on solenoid valve --------------------Secure wire connections
    Loose valve wire on wiring harness ----------------------------Repair wire on edge connector or replace wiring circuit board harness
    Defective E.C.O. --------------------------------------------------Replace E.C.O.
    Defective circuit board--------------------------------------------Replace circuit board
    Defective solenoid valve------------------------------------------Replace coils or solenoid valve
    No gas to solenoid valve ----------------------------------------Correct gas supply
    Dirty connector on circuit board --------------------------------Clean edge connector

    WATER HEATER LOCK OUT - GAS PRESENT BUT NO SPARK
    High tension lead wire loose ------------------------------------Secure wire connection on circuit board
    Electrodes loosely attached to main burner ------------------Secure electrodes to main burner
    Improper electrode gapping ------------------------------------Re-position spark gap to 1/8˝ and into path of flame
    Dirty electrodes --------------------------------------------------Clean electrodes
    Wires loose in electrode porcelain ------------------------------Replace electrodes
    Cracked porcelain on electrode----------------------------------Replace electrodes
    Defective circuit board--------------------------------------------Replace circuit board

    WATER HEATER LOCK OUT - GAS AND SPARK PRESENT
    Gas pressure incorrect ------------------------------------------Set inlet pressure at a minimum 11˝ W.C. with two or more gas
    appliances running
    Low voltage--------------------------------------------------------Correct power supply - 10.5 VDC minimum
    Poor electrical ground--------------------------------------------Secure electrical ground
    Electrodes out of flame pattern --------------------------------Re-adjust electrodes
    Electrodes sparking to screw fastening burner to flue tube Adjust electrodes away from screw
    Dirty electrodes --------------------------------------------------Clean electrodes
    Partial obstruction in main burner ------------------------------Clean main burner
    Partially obstructed main burner orifice------------------------Clean main burner orifice or replace
    Improper air adjustment ----------------------------------------Adjust main burner air shutter approximately 1/4 open
    Flame spreader on main burner out of adjustment ----------Adjust flame spreader so that it is square to the end burner tube out
    of alignment of the main burner
    Manifold not aligned with main burner ------------------------Re-align solenoid valve with main burner
    Partially opening solenoid valve --------------------------------Replace solenoid valve
    Defective circuit board--------------------------------------------Replace circuit board
    Electronic Ignition Water Heater

    TROUBLE SHOOTING GUIDE
    Effective: 5/26/98
    continued
    20
    Electronic Ignition Water Heater (continued) Effective: 5/26/98
    CAUSE SOLUTION
    EXCESSIVE OR INSUFFICIENT WATER TEMPERATURES
    By-pass kit valves not set properly ----------------------------Place valves in proper position
    Thermostat not seated against tank ----------------------------Reseat thermostat
    Defective thermostat----------------------------------------------Replace thermostat
    ERRATIC BURNER FLAME OR SOOTING
    Low gas pressure ------------------------------------------------Set inlet pressure at a minimum 11˝ W.C. with two or more gas
    appliances running
    Poor gas supply --------------------------------------------------Replace gas supply
    Improper air adjustment ----------------------------------------Adjust main burner air shutter approximately 1/4 way open. Flame
    should be mainly blue and quiet.
    Poor main burner alignment ------------------------------------Adjust valve and main burner alignment
    Misaligned burner flame spreader ------------------------------Align flame spreader so it is square with end of burner tube.
    Blocked burner orifice --------------------------------------------Clean orifice. DO NOT enlarge orifice
    Obstructed main burner------------------------------------------Clean main burner
    Obstructed “U” tube ----------------------------------------------Clean “U” tube
    Obstructed exhaust grille ----------------------------------------Remove obstruction
    NO SPARK AND NO GAS
    No voltage --------------------------------------------------------Correct power supply - minimum 10.5 VDC
    Dirty edge connector on circuit board--------------------------Clean edge connector
    Defective thermal cut-off ----------------------------------------Replace thermal cut-off
    Defective ON/OFF switch ----------------------------------------Replace switch
    Defective circuit board--------------------------------------------Replace circuit board
    Defective thermostat----------------------------------------------Replace ther
     
  5. jimothy

    jimothy Read Only Funster

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    Ah. That looks pretty handy - thanks Jim!
     
  6. FULL TIMER

    FULL TIMER Read Only Funster

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    just a thought ,what gas are you using if butane that might be your problem
     
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  7. jimothy

    jimothy Read Only Funster

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    It's on propane. The hob and oven are working fine, and I've checked that the valve to the heater is actually open.
     
  8. SuperMike

    SuperMike Read Only Funster

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    Ask question on sister site RVOC. Loads of knowledge on there. :thumb:
     
  9. rainbow chasers

    rainbow chasers Read Only Funster

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    It will only cut out if there is not enough power ie batteries low. Or there is not enough steady gas flow to light.

    I would remove the water heater flue, check condition and make sure it is not rotted out as this will blow out the flame.

    This may be fine, as the heater is faulty also - I would look at gas supply as my first port of call. It may supply enough for cooker etc, but not enough for heater.
     
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