Question about Bosch & Tankless LP Hot Water Heater

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When I push the button to light the pilot it lights but when I release the button it starts heating the water without any water running. It heats the water in the line and starts popping the pressure relief valve.

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You need a water flow sensor.

Posted on Aug 15, 2010

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How do I start a 1973 komfort travel trailer water heater?


See if big red knob has a PILOT or LIGHT setting and put it on that setting. Next look at knob on bottom-- it should have a circle cutout on it that needs to align with the pilot push button. The cutout lets the button be pushed in. While holding button in---light the pilot and keep holding the button in for about 3 minutes. If everything is working right with the water heater, after 3 minutes or so you can let go of the button and the pilot should remain on. If it stays on. turn the smaller button to the run or heat position and the big burner should come on. Then set the big heat control knob for the heat setting you want.

May 20, 2015 | Water Water Heaters

1 Answer

I stopped the device. I don't know how to restart it.


Hold in your pilot button, then push the spark button repeatedly to light your pilot. Once its lit, hold that pilot button in for 30 seconds to heat your thermocouple. once its heated, release the button, and slide the slider to burner position. Turn on hot water fixtures to get the unit to light

Dec 31, 2013 | Bosch AquaStar Indoor Natural Gas Tankless...

1 Answer

We have an atwood lp gas water heater 6 gallon g6a7 white rogers control. The pilot lights but when we turn it to on it goes out, even after holding it up to a minute. It was running fine, we thought we...


If pilot stay lit, then thermocouple is working.
If pilot will light, then you have gas. If pilot goes out when pilot button is released, then thermocouple is next suspect.

Thermocouple tip must sit in pilot flame.
The pilot light heat applied to two different metals inside thermocouple causes small current.
The current travels back to gas control valve through copper line.
If the gas valve receive this current, then a magnetic switch stays open and allows gas into the gas control valve.
The magnetic switch is on the end of the red button you push down when lighting pilot. Essentially the red button is an override to the magnetic switch.
If the gas control valve does not receive the current, then the magnetic switch does not stay open when you release the red button.
When replacing thermocouple, note that it is not screwed very tight into the gas control valve. Finger tight + 1/4 turn. If it is overtightened, then the small thermocouple current shorts out against the gas control body.

Sep 01, 2012 | Water Heaters

1 Answer

Pilot light would not light but i could hear and smell gas coming out of pilot valve so i took off cover and cleaned it. It still would not light with the ignitor button so I did it manually and there is a...


sounds like the thermocouple:
The thermocouple is a safety device that turns off the gas if there is no pilot light. If you look closely at the burning pilot light, there is a small metal tube that sits directly in the flame, with wires that lead back to the gas valve. The thermocouple generates a small amount of electrical current when heated by the flame. This current keeps the gas safety valve open. If the pilot light gets blown out, the current stops and the gas valve closes. When you light the pilot light, you hold down the over-ride button for about 30 seconds. This allows the gas to flow long enough to heat up the thermocouple and generate current and then you can release the over-ride button and gas will continue to flow. If the thermocouple is defective, then as soon as you release the over-ride button, since there is no electrical current, the gas will stop flowing and the pilot light will go out.

This is a pretty common failure on water heaters and furnaces. Replacement of the thermocouple is fairly simple if you are the handyman type. If not, the thermocouple is a cheap part -- about $10 bucks, but the service call may run you $100 or so. Before you call a serviceman, get all of the brand and model information from the information plate on the heater so he can bring the proper replacement part. And sorry for your trouble. hope this helps:)

Jul 28, 2011 | Bosch AquaStar Indoor Natural Gas Tankless...

1 Answer

I CAN LIGHT THE GAS WATER HEATER WITH THE RESET BUTTON BUT AS SOON AS I LET IT GO, THE PILOT LIGHT GOES BACK OUT.


The thermocouple is a safety device that turns off the gas if there is no pilot light. If you look closely at the burning pilot light, there is a small metal tube that sits directly in the flame, with wires that lead back to the gas valve. The thermocouple generates a small amount of electrical current when heated by the flame. This current keeps the gas safety valve open. If the pilot light gets blown out, the current stops and the gas valve closes. When you light the pilot light, you hold down the over-ride button for about 30 seconds. This allows the gas to flow long enough to heat up the thermocouple and generate current and then you can release the over-ride button and gas will continue to flow. If the thermocouple is defective, then as soon as you release the over-ride button, since there is no electrical current, the gas will stop flowing and the pilot light will go out.

This is a pretty common failure on water heaters and furnaces. Replacement of the thermocouple is fairly simple if you are the handyman type. If not, the thermocouple is a cheap part -- about $10 bucks, but the service call may run you $100 or so. Before you call a serviceman, get all of the brand and model information from the information plate on the heater so he can bring the proper replacement part. And sorry for your trouble. hope it's summer time where you are:)

Jul 26, 2011 | Water Heaters

1 Answer

I have a reliance 501 water heater, the pilot light won't light. What do i do?


It would be my guess without seeing it, that you are not holding the gas button down for the pilot light to start or are releasing it too soon for the thermocouple to heat up enough to allow the passage of gas or the thermocouple itself has become defective.

May 18, 2010 | Water Heaters

1 Answer

How do i use the reset button to turn the hot water to star heating again?


turn the dial to pilot and push and hold down red button while you light the pilot located inside water heater beside burner, keep holding button down after pilot is lit for about 1 minute. If you let go and pilot goes out repeat above steps and make sure pilot flame is heating up the thermal couple. If that fails replace themal couple.

Oct 24, 2009 | Rheem Water Heaters

1 Answer

Pilot light gone out. How do I relight? Which


In general, large button from gas valve push in & hold 20-30 secs at same time push electronic lighter/ignition button to light pilot. Remember to hold in only gas button. the pilot light heats up a thermo couple [u can see this in the flame] and when hot enough allows the main gas through and the pilot to remain on.
If not then either thermo couple not heated for long enough or
it may need replacing

Oct 22, 2009 | Bosch Water Heaters

2 Answers

My pilot light will light, but will not stay lit? I have a gas whirpool water heater aprox 1 1/2 years old.Thisis the first time we have encountered any problems with our appliance.


Once the flame has struck it heats up a thermocouple that in turn holds the gas valve open

It is a safety measure in case the flame blows out and the gas keeps on coming.

Sometimes the end of the thermocouple gets dirty and a scrub with a fine emery board does the trick

If not it is a new part (They are not that expensive)

Jul 07, 2009 | Whirlpool Water Heaters

1 Answer

Pilot goes out once button is released


If the new thermocouple was installed properly, with its tip in or across the pilot flame so as to be heated by the flame, then the control valve may be faulty.

Note: The pilot primer button may need to be held down for a longer period of time.

Aduz

Mar 24, 2009 | Water Heaters

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