How can I relight a JUNKERS Bosch Gruppe gas appliance to heat up the water(no tank)? A label on the side of the unit goes like this: HR 275-1 K D D P23 S1492 FD 665 Y

SOURCE: Rheem water heater with powerglow ignition wont re-light

I have fixed mine. The problem part is the Ignition Control module. It is made by Robert Shaw part # SP10758. I paid $93 plus shipping.

Works great now. A repairman wanted to sell me a gas valve for $488.
Watch out for these people.....

SOURCE: Bosch 2700es natural gas unit keeps going out requiring a relight

Actually, this comment if coming from the math building at LSU!!!! How nice.

Any ways......You probably have a faulty thermo couple. It is the easiest and cheapest thing to do so try that. Most units have reverse threads so keep that in mind when removing. It is identified by a copper wire that leads to the main control unit. It should also be held in-place by some clips that just pinch the copper in place. Replacing the new one will be just the reverse of the removal.

Hope this helps

SOURCE: Tankless water heater pilot light will not stay on

It is most likely the water valve stuck open, telling the controls to heat water, that it thinks is flowing through it, but without actual flow it overheats. Depending on how comfortable you are with taking it apart yourself, you could open the valve to see if it just needs cleaned out, or if you have a ruptured diaphragm or some other cause.

Mike Butler

• 6674 Answers
• Posted on May 25, 2010

SOURCE: I have atwood pilot relight model gc6aa-8 pilot

So are you saying that the first initial lighting of the pilot, without turning to on, works o.k., good flame etc, ? If not sure, try lighting pilot only, and leave setting at pilot only, and see if it's a good flame, and get back to me.

SOURCE: Pilot won't stay on after tank heats up

http://homerepair.about.com/od/plumbingrepair/ss/trblsht_hwh_2.htm

Check out this web site for information on gas water heaters.