AO Smith GPSH Water Heater In System Lockout Mode - Plumbing - DIY Home Improvement | DIYChatroom


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 04-27-2010, 09:08 AM   #1
Member
 
Join Date: Feb 2010
Location: Kentucky
Posts: 167
Rewards Points: 150
Default

AO Smith GPSH water heater in System Lockout mode


I have a 5 year old AO Smith 'GPSH with Hot Surface Ignition' water heater that will not heat water. I will cycle the power and when it comes back on the fan will run for a less than a minute then kick off, then run for less then a minute and kick off, then it goes into System Lockout.

I checked the manual and it states these could be the issues

1. Gas supply is off or too low to operate - gas is on and working to stove and fireplace
2. Hot Surface ignitor not positioned correctly - ?
3. Low Voltage to the water heater - Don't know why this would all of a sudden happen
4. Electric Polarity to unit is incorrect- Don't know why this would all of a sudden happen


I am finishing my basement and have been cutting wood down there. I have tried to keep everything as clean as possible, could the dust have done something?

Thanks and any help would be appreciated. Ice Cold showers suck!

Advertisement

Abs777 is offline   Reply With Quote
Old 04-27-2010, 01:12 PM   #2
Member
 
Join Date: Jan 2010
Location: Massachusetts
Posts: 64
Rewards Points: 75
Default

AO Smith GPSH water heater in System Lockout mode


When you cycle the heater does the ignitor glow?

Advertisement

SuperPlumberGuy is offline   Reply With Quote
Old 04-27-2010, 01:15 PM   #3
Member
 
Join Date: Feb 2010
Location: Kentucky
Posts: 167
Rewards Points: 150
Default

AO Smith GPSH water heater in System Lockout mode


I haven't watched it. I will check it out when I get home.
Abs777 is offline   Reply With Quote
Old 04-27-2010, 09:27 PM   #4
Member
 
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 6,976
Rewards Points: 2,048
Default

AO Smith GPSH water heater in System Lockout mode


SOme of these newfangled heaters, particularly those with electronic control and motorized flues, also have an air filter for the combustion air and the filter could need cleaning.

If combustion air is from inside as opposed to a concentric intake/exhaust pipe to the outside, then your carpentry work down there could have made enough dust to clog the filter.
__________________
Forget super sized fries. The Washington Redskins could promote healthy eating with First Lady Obama by choosing a (red skinned) turnip for a mascot.

Last edited by AllanJ; 04-27-2010 at 09:30 PM.
AllanJ is offline   Reply With Quote
Old 04-28-2010, 08:48 AM   #5
Member
 
Join Date: Feb 2010
Location: Kentucky
Posts: 167
Rewards Points: 150
Default

AO Smith GPSH water heater in System Lockout mode


I found out what it was. It was a dirty Flame sensor. I guess it was thinking that there wasn't a flame \wasn't getting gas and kicking itself off. I unplugged the water heater, pulled the bottom plate off (1 screw, undid the gas line (turn off the gas first), and pulled out the burner assembly. I then took sand paper and cleaned the flame sensor, put everything back together and boom HOT WATER. It was less than 20 minutes and saved me at least $100. The flame sensor looks like this (on the right) if anyone finds this thread in the future.



Thanks for the help.
Abs777 is offline   Reply With Quote
The Following 5 Users Say Thank You to Abs777 For This Useful Post:
boshjales (06-16-2012), cobra617 (10-02-2014), jodi n chris (10-28-2012), Maxun (06-26-2012), plummen (08-24-2012)
Old 07-16-2010, 08:01 PM   #6
Newbie
 
Join Date: Jul 2010
Posts: 1
Rewards Points: 10
Default

AO Smith GPSH water heater in System Lockout mode


I just had this problem and your suggestion got me back up and running. Had to register just to say thanks!!! God Bless! Thanks ABS777

Last edited by revkev32; 07-16-2010 at 08:02 PM. Reason: forgot user
revkev32 is offline   Reply With Quote
Old 07-18-2010, 07:06 PM   #7
Member
 
Join Date: Feb 2010
Location: Kentucky
Posts: 167
Rewards Points: 150
Default

AO Smith GPSH water heater in System Lockout mode


Glad I could help and thanks for the shout out.
Abs777 is offline   Reply With Quote
Old 06-06-2011, 07:43 AM   #8
Newbie
 
Join Date: Jun 2011
Posts: 1
Rewards Points: 10
Default

AO Smith GPSH water heater in System Lockout mode


Just wanted to post a reply to say this saved my bacon. I just had the exact same issue - removed the burner assembly, cleaned up the sensor and BAM, hot water, working as normal. Thanks!!
hikermike is offline   Reply With Quote
Old 06-21-2011, 10:00 PM   #9
Newbie
 
Join Date: Jun 2011
Posts: 6
Rewards Points: 10
Thumbs up

AO Smith GPSH water heater in System Lockout mode


Ditto here - system kept shutting off and going into 'lockout' mode after 3-4 seconds of burn. A little sandpaper on the sensor and I'm back up and running - very happy wife and daughter (which makes for a very happy me

Thanks for the info
caufmantr is offline   Reply With Quote
Old 06-22-2011, 07:22 AM   #10
Member
 
Join Date: Feb 2010
Location: Kentucky
Posts: 167
Rewards Points: 150
Default

AO Smith GPSH water heater in System Lockout mode


Glad I could help out.
Abs777 is offline   Reply With Quote
Old 08-02-2011, 03:37 PM   #11
Newbie
 
Join Date: Aug 2011
Posts: 1
Rewards Points: 10
Default

AO Smith GPSH water heater in System Lockout mode


I too, had to register just to THANK-YOU!!

I am a female that has had nothing but bad luck lately..(sitting right now getting my air in my car fixed)...

Well not to change my luck I was taking a shower after mowing my 6acres and NO HOT WATER!!

My home is only 7 years old...warranty on hot water heater 6 years (haha).

Looked at the LED panel and seen I had a systems lockout problem.
googled it and found your solutions.

Printed off your solution along with your pic.

Called my son's dad (good think I never raised his child support payments when my son was young) and with a little whinnning he came over and fixed it no problemo.

My finished walkout had flooded a few months ago and they just finished drywallying so the dust probably caused the issue.

Thank-you soooo much!!!
dkrol is offline   Reply With Quote
Old 08-08-2011, 09:58 PM   #12
Newbie
 
Join Date: Aug 2011
Posts: 3
Rewards Points: 10
Default

AO Smith GPSH water heater in System Lockout mode


Another thank you to Abs777. I have a State water heater but same solution. Thanks again.
kek722 is offline   Reply With Quote
Old 12-25-2011, 10:18 PM   #13
Newbie
 
Join Date: Dec 2011
Posts: 1
Rewards Points: 10
Default

AO Smith GPSH water heater in System Lockout mode


Wow! Christmas evening and no hot water. Been having this issue but I had been able to just reset the heater and it comes back on after 3 or 4 tries. That would not work tonight. Finally was going to call a tech tomorrow and decided to jump online. Thank god I did. Thank you all for the help. Took out the sensor like the people above and it worked like a charm. Hope I don't jinx it by posting this. God Bless and Merry Chrostmas!
kevgmeta is offline   Reply With Quote
Old 04-03-2012, 11:36 AM   #14
Newbie
 
Join Date: Apr 2012
Posts: 1
Rewards Points: 10
Smile

AO Smith GPSH water heater in System Lockout mode


This worked for me too. The unit would start up, the igniter would glow, the flame would light and then the system would shut down. It recycled about 3 times, then lockout mode. Then maybe after 30-60 minutes it would "try" again.

"Pulling the burner/ignitor/sensor assembly is fairly easy. Turn off gas, unplug unit, loosen/disconnect the gas tube going to the burner (below electronic/thermostat/valve unit) and disconned the wire assembly plug (again located below electonic assembly) then take off 2 nuts located on a metal panel at base of unit thru which the gas tube/ignitor/sensor wires traverse a metal panel. You can now pull the entire unit out and clean it. I suspect care should be taken to not touch the ignitor as it ceramic & fragile. I cleaned the sensor with fine steel wool, vacuumed the burner unit and the chamber within which this whole assembly resides. Then reposition unit and reconnect gas tube and wires to the "electronic control/valve/thermostat. Obviously care should be taken that the gas tube is reconnected properly. Check for leaks (I use an electronic hand held gas leak detector that I got from one of the big box stores for about $30 (I check all gas equipment as a safety measure from time/time)) when the unit is now (hopefully) working. Note gas only goes thru that tube/connection when unit is running.
wwoody is offline   Reply With Quote
Old 04-05-2012, 02:08 PM   #15
Chicago, IL
 
Michael Thomas's Avatar
 
Join Date: Jan 2008
Location: Chicago, IL
Posts: 1,037
Rewards Points: 500
Default

AO Smith GPSH water heater in System Lockout mode


I'll add that I just had to do the same at a Takagi tankless water heater which would cycle on and then quit, displaying a "12" error on the installed auxiliary thermostat.

Advertisement

__________________
Home Inspections, Infrared (Thermal Imaging) Leak Identification and Inspection Services, Roof, Attic, Building, Basement and Foundation Moisture Intrusion and Water Leak Inspections, Troubled Building Consultations - Serving Chicago and Suburbs http://paragoninspects.com/
Michael Thomas is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Desiging a manifold water system? BowDown Plumbing 1 07-20-2009 12:00 PM
Stumped. Water heater woes. bigcaddy Plumbing 35 06-14-2009 06:12 PM
Natural Gas Water Heater Leaking from Release Valve Pipe? psumike Plumbing 6 01-14-2009 08:18 PM
low hot water pressure angus242 Plumbing 10 01-08-2009 12:41 PM
Water level in boiler system Barefoot Brian HVAC 3 10-19-2006 02:11 PM




Top of Page | View New Posts