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Bosch250sx tankless water heater how to replace electrodes

Posted by Sylvia Johnson on

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5 Related Answers

gary1121

gary miller

  • 332 Answers

SOURCE: Paloma PTG 74PVN Tankless Water Heater

did you check the filters on the the water valves, i am not exactly sure about your codes that are shoeing but if you could read it and post them, i know on some of the units 76 means there is low water pressure and the filters are behind 2 caps one on each side above the shut off valve take off the caps and remove the screens, clean them and replace them ,, make sure you turn off the water on both side first or you will get wet

Posted on May 29, 2009

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Anonymous

  • 11 Answers

SOURCE: takes too long for hot water.

You need a recirculating line. You will have to hire a plumber to run a water line from the farthest fixture or to the fixture you are concerned about on the hot side and return it back to the water heater. this will cause hot water to constantly run throught the hot water line (via the recirculating line) and when you want to draw water from the fixture, you will already have hot water right at the line.
I know this works with standard tank water heaters, but it is a lil trickier with rinnai units(but very possible) if your plumber pleads the 5th and tries to sell you another unit call the Rinnai manufacturerand ask them how.

Posted on Jun 20, 2009

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mariomadriga

  • 1 Answer

SOURCE: My Paloma tankless water heater flashes C2 11 error code

I just had the same problem and I fixed it in about an hour or 2. First shut off the gas,water and power(unplug it) Take off the cover There are about 20 screws above the electrical circuit board. You have to remove all of those screws to remove plate that is covering the burner assembly. The burner assembly has these 3 pins that look like number 7's these are covered with build up and gas can't flow right. That's why you get the c211 error not enough gas. Take a wire brush and gently remove any build up, I also cleaned the thermocoupler which is next to the burners. It looks like a metal pin with a couple of wires coming out of it this was also very dirty. I took a can of air and basically freshened it up It works perfect now. Email me with any Q's at [email protected] Good Luck All that you need is a long phillips screw drive and a drill because its about 25 screws
The burner assembly has 2 screws all the in back underneath the assembly once you remove those 2 the assembly comes out . You don't have to disconnect any wires.

Posted on Oct 29, 2009

Anonymous

  • 244 Answers

SOURCE: Paloma tankless, gas, water heater, error code C7 76

If you look on the left hand side of the burner control module you'll see 4 capacitors - the capacitors have most likely failed...pretty sure anything code 76 is P/S failure. It may also be covered for manufactures defects. If the cap is blown..the top will be slightly raised as apposed to flat like the other nearby caps - they are called top blow capacitors...the damage should be evident.

Posted on Nov 01, 2009

Lickzee

  • 68 Answers

SOURCE: rheem gas tankless water heater with error code c4 13

problem is inside burner compartment o2 sensor dirty or block..need to have a qualify technician clean it.

Posted on Jul 31, 2010

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1 Answer

What does an EA reading mean on my Bosch Tankless Hot Water Heater mean?


Error code EA - No sparks for the electrodes
The ionization electrodes are not making sparks when water is flowing. There are many reasons for this problem and here are some; low gas pressure, fan speed is low, wire connections are loose, the air in the gas line, no gas.

Sep 07, 2018 | Bosch Water Heaters

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Bosch 125fx heater barely heats water


1) Recommend replacing tankless with ordinary tank-type gas water heater.
http://waterheatertimer.org/How-to-install-gas-water-heater.html
http://hometips.me/Mar/Which-is-best-gas-water-heater.pdf

2) Tankless cannot be exposed to more than 11 grains hardness in water or unit will fail within 2-5 years. Water softener is required.
http://hometips.me/Tls/Battelle_Water-softening-research.pdf

3) Descaling tankless water heater each year will not restore functionality, or restore efficiency of tankless, nor restore full efficiency to tank-type gas water heater.

4) Bradford White side-by-side testing research comparing their tankless with their tank-type shows that tankless will save $1-8 per month on energy bill vrs ordianry tank-type ....but conclude that tankless 'fall far short of payback' due to maintenance, repair, installation and replacement costs.
Study compared full cost, and not just monthly energy bill, since All costs are energy.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Feb 16, 2013 | Water Heaters

1 Answer

Water heater turns off in the middle of a shower


I have had a few experiences with the tankless water heaters, the only time they have turned themseves off while in service was due to reduced water pressure (perhaps someone turns on another water source while the shower is running) or, a reduced flow/supply of gas/propane. (Perhaps another appliance is turned on.) In one case for me there was residue on the flame rods/electrodes that was preventing the flame to remain on at the required rate. Good luck :)

Feb 04, 2011 | Rheem Paloma PTG-42PVN / RTG2-42PVN...

1 Answer

The thermostat is set at 120 degrees, but after the shower runs for a bit, it clicks off to 7C /76 degrees. Why won't it stay on?


I have a Rheem PTG-74XP tankless. When the water was turned on the unit would engage briefly then turn off. After (much) troubleshooting, it turned out to be caused by a decrease in the flow of gas (propane in my case). The cover panel had to be removed and the flame rod/electrodes had to be cleaned. I did call for a service tech to do this but in retrospect I probably could have researched enough online to do it myself. The other possibility reported to me (and in my case not the prob) was a lack of consistant pressure from the gas source. Good luck!

Feb 03, 2011 | Rheem Paloma Tankless Water Heaters...

1 Answer

How can I tell how many BTU's my natural gas meter is rated to supply? I'm getting an error code 12 on my Rheem EcoSense 9.5 GPM 199,900 BTU Natural Gas Indoor Tankless Water Heater, so I'm guessing the...


I have a Rheem PTG-74XP tankless. I had the same code 12, low/inconsistant gas problem (assumption). In my case the gas (propane) pressure coming in was fine, the reason the flame rods/electrodes would not burn correctly was residue on/in them. It hasn't happened since they were cleaned. Hope this helps, dj :)

Feb 03, 2011 | Rheem EcoSense by 7.4 GPM Tankless Water...

1 Answer

Our water heater (model # PTG-74PVP-2) is flashin C7 76. THe water is cold. If we turn it off and back on it is hot for a while but then turns off again. We can't find our manual. WHat does this mean?


I have a Rheem PTG-74XP tankless. When the water was turned on the unit would engage briefly then turn off. After (much) troubleshooting, it turned out to be caused by a decrease in the flow of gas (propane in my case). The cover panel had to be removed and the flame rod/electrodes had to be cleaned. I did call for a service tech to do this but in retrospect I probably could have researched enough online to do it myself. The other possibility reported to me (and in my case not the prob) was a lack of consistant pressure from the gas source. Good luck!

Jan 16, 2011 | Rheem EcoSense by 7.4 GPM Tankless Water...

1 Answer

250sx quit working. Gas o.k. water flow good, throws ea code after 3 start attempts. 1. where is the ionization electrode, and is the fan supposed to come on before ignition? Fan comes on afterea code....


The gas pressure must be increased at the regulator from 9 inches of water column to about 12.5-13 inches of water column. The CO2 levels need to be adjusted for each installation. The air intake MUST come from outside the same wall as the exhaust. I have never seen any manufactures tankless unit installed properly. Plumbers do not read the manual.

Jan 24, 2010 | Bosch & Tankless LP Hot Water Heater

1 Answer

My hot water heater is not producing hot water. Flashing code EA


hi i think your problem is with a dirty connection on one of the three electrodes they are situated under the black plastic air intake in the bottom half of the unit take them out and clean the connections with fine sandpaper hope this helps

Dec 03, 2009 | Bosch & Tankless LP Hot Water Heater

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