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Old 09-27-2014, 03:00 PM   #11
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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.
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Old 09-27-2014, 07:14 PM   #12
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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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Old 09-27-2014, 07:26 PM   #13
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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
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Old 09-28-2014, 05:27 PM   #14
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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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Old 09-28-2014, 05:35 PM   #15
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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..
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Old 09-28-2014, 07:31 PM   #16
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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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Old 09-28-2014, 07:56 PM   #17
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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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Old 09-29-2014, 08:43 AM   #18
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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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Old 09-29-2014, 09:58 AM   #19
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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.
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Old 09-29-2014, 11:00 AM   #20
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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.
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