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09-26-2014, 06:28 PM
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#1
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Junior Member
Join Date: Aug 2014
Location: Oakley
Posts: 6
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Tankless Water Heater Not Working
Hello all,
The wife and bought a Jayco Greyhawk 29KS. We are currently on our first trip,
And I can't get any hot water. Propane is full an on, water heater is turned on and fires up but their is not any heat. I have purged the air out of the system, started the heater with water running and not. Water heater fires up and then turns off. Dealership could not do anything over the phone. Any help would be great. Thanks in advance
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09-26-2014, 06:39 PM
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#2
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Lost in the Woods
Join Date: Jun 2014
Location: Woodstock
Posts: 1,128
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Welcome
is this a brand new unit?
what model heater?
Are you sure it is turning off?
Maybe the bypass line(if equipped) is open mixing cold into the hot water line
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09-26-2014, 07:09 PM
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#3
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Junior Member
Join Date: Aug 2014
Location: Oakley
Posts: 6
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Looked in the manual but can't find the bypass you mentioned. Any idea where it might be located. Yes this is a brand new unit, and water heater is a Girard model GSWH-1M
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09-26-2014, 07:12 PM
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#4
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Lost in the Woods
Join Date: Jun 2014
Location: Woodstock
Posts: 1,128
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what model heater. You will have to look at the pipes in back of the heater and see what is there.
Look at the lines and see if there is a point where there is a valve that could mix hot and cold. see if it is open
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09-26-2014, 07:25 PM
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#5
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Lost in the Woods
Join Date: Jun 2014
Location: Woodstock
Posts: 1,128
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upon more research perhaps it doesn't require a bypass.
Are all taps closed on the outside shower? That is a common point where cold can mix with hot
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09-27-2014, 06:25 AM
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#6
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Member
Join Date: Feb 2014
Location: Poconos of Pennsylvania
Posts: 51
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Did you try moving the control in the bathroom, or at least that is where mine is?
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09-27-2014, 06:44 AM
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#7
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Junior Member
Join Date: Aug 2014
Location: Oakley
Posts: 6
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Yup tried that control knob also. Re purged all the lines again started and restarted the unit . Looks like cold showers this morning .
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09-27-2014, 07:11 AM
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#8
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Lost in the Woods
Join Date: Jun 2014
Location: Woodstock
Posts: 1,128
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anything on google doesn't sound to promising about that system. Good luck but it is over my head. Sounds like a trip to a tech.
Never understood the need to change what always worked perfect in the RV industry.
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09-27-2014, 07:32 AM
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#9
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Lost in the Woods
Join Date: Jun 2014
Location: Woodstock
Posts: 1,128
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Do you have a water pressure regulator on your fresh water intake?
They are necessary to prevent blow outs on your plumbing fixtures but it sounds like these tankless heaters need 45psi at a minimum....
maybe pressure or lack of is the issue
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09-27-2014, 08:17 AM
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#10
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Junior Member
Join Date: Aug 2014
Location: Oakley
Posts: 6
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Yes we do have the regulator I also searched on Google and it seems this system is very sensitive. It's a Balmy 51 degrees outside so we may have to forgo the showers this morning .
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09-27-2014, 02:00 PM
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#11
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Senior Member
Join Date: Jul 2014
Location: KC MO
Posts: 358
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There is a reset button in the area of the wh itself. Not very well marked. If this has been tripped it needs to be reset. Trying to brainstorm. If you are hooked up to sewer and can empty your grey tank, how long have you run the hot water faucet before you shut it off? Water temp, air temp and dial setting in the bathroom.
Check these 2 threads and see if any of their advice helps.
http://www.jaycoowners.com/forums/sh...ankless+heater
http://www.jaycoowners.com/forums/sh...s+water+heater
Hope this helps.
__________________
Darrell, Mary & K.C. Toller Mix
In our hearts: Goldens, Tess & Jericho
'15 Jayco Precept 31 UL "Bertha"
'13 Wrangler Sahara...AKAFUN
Roadmaster base plate
Ready Brute Elite towbar and brake combo
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09-27-2014, 06:14 PM
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#12
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Member
Join Date: Feb 2014
Location: Newburgh, NY
Posts: 42
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You should first hear the tankless fan come on. It runs for a few seconds to purge any fumes from the heater. There is a flow switch there that verify the fan operations. The gas valve opens and at the same time the spark starts ticking just like a car spark plug. You may be able to see the spark inside the copper enclosure that houses the burners. If you get ignition, it should be running. If no ignition it attempts to start three times then locks out. Resetting power will allow it to try to start again. I spent time on the phone with Girard and by removing the spark plug, holding it near the frame inside the enclosure looking for a spark, they determined that it was a defective spark plug and shipped me a replacement. The white wire running from the controller on the left to spark plug on the right carries the juice for the plug. GOOD LUCK !
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09-27-2014, 06:26 PM
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#13
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Senior Member
Join Date: Sep 2013
Location: Fort Worth
Posts: 355
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Did you check the water pressure , sometimes my brother inlaw tankless water heater wont work properly if the pressure is to low JUST MY TWO
__________________
KELLY & LINDY ( SEMI RETIRED)
FORT WORTH,TEXAS
2000 FORD F-150 V-6/4.2
2006 JAYCO JAY FEATHER 23B EXP
EQUILIZER HITCH
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09-28-2014, 04:27 PM
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#14
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Junior Member
Join Date: Aug 2014
Location: Oakley
Posts: 6
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Tanks for all the Help. Rv will go to the shop next week for the oven to be replaced and will have them check out the water heater.
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09-28-2014, 04:35 PM
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#15
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Senior Member
Join Date: Aug 2014
Location: Spicewood, Texas
Posts: 913
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Let see now...make myself a note...NO tankless water heaters in my future...I like finding my privates after a shower..
__________________
2015 338RETS Eagle Premier gloss sides., king.
2012 Ram 3500, crew cab 4x4 duelly Deleted
16k miles, 530HP, 1000 +torque.
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09-28-2014, 06:31 PM
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#16
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Member
Join Date: Feb 2014
Location: Newburgh, NY
Posts: 42
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Did you figure out what the problem was ? If so, share it in Case I have another issue in the future. Just a hint, set the dial in the bathroom to a comfortable temperature. The lower, the better. Get in the shower and add the minimum amount of cold water to temper it..
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09-28-2014, 06:56 PM
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#17
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Junior Member
Join Date: Apr 2013
Location: NE Ohio
Posts: 27
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I called the manufacturer directly. LSS, it was the flow sensor. A new one was waiting for me when I got home.
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09-29-2014, 07:43 AM
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#18
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Member
Join Date: Apr 2014
Location: Kansas City
Posts: 57
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I had a similar problem with my new Greyhawk 31 DS. There is a red lighted power switch in the bathroom but I also found a power switch outside behind the vent cover, which was off. Turned the outside switch on and it started working.
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09-29-2014, 08:58 AM
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#19
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Senior Member
Join Date: Jun 2014
Location: Clearwater
Posts: 172
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Sounds like this may have been more than what I experienced on our first outing last week on our Precept 31 UL. At one point the water heater just stopped producing HOT water. The blower kicked on etc as usual but no hot water.
Having read some of the previous posts I figured it was the ECO button that needed to be reset, but darned if I could find it. A simple call to the manufacturer and quickly I was walked through where to find it. Pressed the button, turned on the hot water faucet in the kitchen and we were good to go.
I was also told to make sure the dial in the bathroom was at the mid-point and to adjust slightly up and down to taste. The dial had been set all the way to the right (HOT) and that tripped the ECO.
__________________
2015 Jayco Precept 31UL
Tow: 2014 Ford Fusion SE HYBRID
Blue Ox BX7420 Avail Towbar
SMI Duo "Stay in Play" Braking
Barley, our Golden Retriever, on board and Buster in spirit!
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09-29-2014, 10:00 AM
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#20
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Member
Join Date: Apr 2011
Location: Highlands Ranch, CO
Posts: 71
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McGarrett50... This sounds EXACTLY like what my unit is doing! WHERE is the ECO button, can you describe please? Thanks!! My dial is ALL THE WAY to the right as well, I'll adjust that to the "mid point" as you describe.
__________________
Woody B.
Highlands Ranch, CO
2015 Seneca 37TS ("Screaming Eagle")
2009 Hummer H3 ("Ranger")
2005 Chevy 2500HD ("Max")
2008 MasterCraft X-15 ("One More Time")
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