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Suburban sw6d hot water heater

evergladesgator
Explorer
Explorer
Where on hwh to check for 12 volts ? What terminals ? Turn switch on,valve opens, igniter sparks, flame ignites, shuts down in 10-15 seconds.
thanks
gator
2000 F250 Super Duty 7.3 PSD.
1999 Skyline 2427 Nomad 5th wheel.Rancho 9000s, Prodigy, Me, wife & two spoiled chihuahuas. PeePee aka Penelope(6/97-7/08) & Hannah (19 now and seen the USA ). New kid Chiquita aka ChiChi.
10 REPLIES 10

09FLSTC
Explorer
Explorer
Old-Biscuit wrote:
09FLSTC wrote:
powderman426 wrote:
Firstly, it's a water heater. We don't need to heat hot water. If it's sparking and igniting you probably have good voltage. Its most likely going out because the thermocouple is either bad or out of position.

It is also a hot water heater because the water is often still hot when it lights to maintain temperature when cooler water is introduced but we know how people love to insert cleverness, lol but you are also correct that it's most likely the thermocouple ๐Ÿ™‚


Doesn't use a 'thermocouple'

Then square him away.

Old-Biscuit
Explorer III
Explorer III
09FLSTC wrote:
powderman426 wrote:
Firstly, it's a water heater. We don't need to heat hot water. If it's sparking and igniting you probably have good voltage. Its most likely going out because the thermocouple is either bad or out of position.

It is also a hot water heater because the water is often still hot when it lights to maintain temperature when cooler water is introduced but we know how people love to insert cleverness, lol but you are also correct that it's most likely the thermocouple ๐Ÿ™‚


Doesn't use a 'thermocouple'
Is it time for your medication or mine?


2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31

09FLSTC
Explorer
Explorer
powderman426 wrote:
Firstly, it's a water heater. We don't need to heat hot water. If it's sparking and igniting you probably have good voltage. Its most likely going out because the thermocouple is either bad or out of position.

It is also a hot water heater because the water is often still hot when it lights to maintain temperature when cooler water is introduced but we know how people love to insert cleverness, lol but you are also correct that it's most likely the thermocouple ๐Ÿ™‚

evergladesgator
Explorer
Explorer
Thanks to all.
gator
2000 F250 Super Duty 7.3 PSD.
1999 Skyline 2427 Nomad 5th wheel.Rancho 9000s, Prodigy, Me, wife & two spoiled chihuahuas. PeePee aka Penelope(6/97-7/08) & Hannah (19 now and seen the USA ). New kid Chiquita aka ChiChi.

Old-Biscuit
Explorer III
Explorer III
THIS is the spark electrode (and flame sensor)

Has to be directly in main flame...engulfed

When main flame is lit..a milivolt signal is generated thru 'flame ionization'. Signal goes back to circuit board 'proving' main flame lit off. If circuit board doesn't get signal....DC power to gas valve is dropped.

Doesn't take much to impede milivolt signal....
Dirty electrode
Electrode not in main flame
electrode ceramic cracked..signal goes to ground
wire from electrode to board...dirty/loose connections

Hopefully it is problem with electrode and not signal track on board.....new board
Is it time for your medication or mine?


2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31

j-d
Explorer II
Explorer II
Go to Chris Bryant's Site and get the Service Manual.

I think you'll find that this heater uses Flame Sensing. If so, the same element that the ignition spark jumps from is also the Sensor. It's pretty scientific and I'm not so I can say that it senses Ionization... That is different from the old Thermocouple scheme.

If the Flame Sensor is out of place or perhaps even dirty, it'll not realize a flame is burning. It's doing re-light attempts and only does X number of those before giving up till you cycle the On/Off switch.

Manual will tell all.
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB

old_guy
Explorer
Explorer
clean the sensor

evergladesgator
Explorer
Explorer
Yes, it tries to restart time after time but with same results. Ignition , flame ,shutdown after ignition,flame shutdown. When flame is burning, it is a really good lookin flame. Nice and blue. What does sensor look like and where is is the flame sensor ?????
thanks
gator
2000 F250 Super Duty 7.3 PSD.
1999 Skyline 2427 Nomad 5th wheel.Rancho 9000s, Prodigy, Me, wife & two spoiled chihuahuas. PeePee aka Penelope(6/97-7/08) & Hannah (19 now and seen the USA ). New kid Chiquita aka ChiChi.

powderman426
Explorer
Explorer
Firstly, it's a water heater. We don't need to heat hot water. If it's sparking and igniting you probably have good voltage. Its most likely going out because the thermocouple is either bad or out of position.
Ron & Charlotte
WD8CBT since 1976
32' Gulfstream Ameri-Camp & 05 Ram QC LB

I started with nothing and I still have most of it left

I never fail, I just succeed in finding out what doesn't work

jtel
Explorer
Explorer
dose it try to relight after the 15-20 sec.? you don't have a voltage problem or it would not lite at all.sounds like it is not sensing the flame and shutting down the gas valve.
2006 Sportscoach Encore