Heating woes - Atwood Confort 3 (1 Viewer)

[jamieBG]

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.

 

[pablomc]

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

 

[jamieBG]

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.

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[scotjimland]

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

 

[jamieBG]

Ah. That looks pretty handy - thanks Jim!

 

[FULL TIMER]

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

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[jamieBG]

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

 

[SuperMike]

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

 

[rainbow chasers]

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.