Question about Bosch & Tankless Water Heater

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New gas bottles installed but hot water not working

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1 Answer

You posted under Bosch tankless water heater.
The suspect is probably gas supply, gas valve, or gas related part inside tankless unit.

Before calling service technician, open following link for Bosch tankless troubleshooting resources, including Bosch contact information, typical manuals, error codes, tech support, parts, fuel-saver calculator, service bulletins, water heater forum, fixya links, disclaimers, and links for finding service technician.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Read manual cover to cover, make sure tankless receives yearly maintenance as outline in manual.

Add a comment with your experience so others with same-similar problem can benefit.

Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Posted on Apr 02, 2011

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Posted on Jan 02, 2017

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Related Questions:

1 Answer

Easy way to replace it


Replacing a water heater is no very difficult if you follow the steps.
1. If it is electric turn of the breaker and check to be sure it is the right breaker. If it is gas turn off the valve close to the water heater.
2. Turn off both the hot water and cold water valves
3. Drain all water out of the heater.
4. Disconnect the electric wiring if electric and if gas disconnect the gas line.
5. Disconnect both water lines which may have to be cut depending on how they are connected.
6. Now you can remove the water heater and discard.
7. Place new heater where old one was removed and reconnect both water lines and be sure you have a new pressure valve installed on the water heater.
8. At this point you can turn on water and check for leaks. you should also open a hot water faucet to purge the air out.
9. If no leaks go ahead and hook up the electric or gas lines and if gas is used turn it on and check for leaks using a leak detector or a spray bottle of soapy water and look for bubbles. If no leaks you can go ahead and light the heater according to its instructions.
10. If electric is used turn it on.
11. Take a long hot shower.

Feb 01, 2016 | Water Heaters

1 Answer

We have a gas unit in our ensuite for a hot water we can not seem to get any hot water the gas cylinders are getting low so i have asked for them to be refilled or could i there.


refill the gas bottles and then if that doesn't fix it, get a technician out as it may be the pressure switch not opening the gas so that the pilot light ignites the burner

May 03, 2015 | Bosch Water Heaters

1 Answer

I have moved into a property with a kelvinator LPG


Most probably the flow switch that senses water flow and opens the gas and turns it on is stuck due to not being used.

Sep 18, 2014 | Water Heaters

1 Answer

Installed a new GE Water Heater 40 gal (Gas based) I have the set thermostat at position A. The problem I have is I get very hot water for 10 seconds and then the water gets cooler and cooler quickly. Even...


1) First of all, did you install yourself?
Did you connect hot and cold water pipes correctly.
If hot and cold are reversed, water heater will not work.
Look at markings on top of tank.

2) Is gas valve all the way open? Is valve handle parallel with gas line?

3) Is water heater in a closed closet when it cannot get air?
4) All gas combustion appliances need air supply and outdoor venting.

5) Next thing, is to add a comment with exact size and type of water heater as shown on label on side of tank.
I might be able to access manual for troubleshoot.

Read the manual cover to cover twice.
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html
http://waterheatertimer.org/How-to-adjust-water-heater-temperature.html

6) All water heaters come with warranty.
Return water heater to Home Depot, or outlet store and get another one.

7) Read information how to install:
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Mar 04, 2011 | General Electric Water Heaters

1 Answer

It is leaking out of the top. not out of the hot or cold valves but out of a nut by the cold side.


Your tank is rusted out and needs to be replaced.
Link below is a troubleshoot for leaking water heater.
http://waterheatertimer.org/Leaking-water-heater.html

Protect yourself first:
If your tank is rusted, there is danger of rupture.
My friend welded his leaking tank, but he assumes the risk.
Ruptured tank can cause massive damage and water runs until it is shut off.

Hot water tank is under pressure because hot water expands and pushes against tank wall.
Turn off water to tank.
Turn off power supply:
Electric: turn off circuit breaker.
Gas: rotate knob to pilot so pilot stays lit but burner will not fire. To turn back on, rotate knob to ON.
Open hot side bathtub valve and relieve pressure on tank.

You can limp by with rusted tank by turning water heater on when hot water is needed.
Shower uses 5-9 gallons hot water
Bath uses 12-15 gallon hot water
Ordinary gas heater makes 41 gallons hot water per hour
Ordinary electric heater makes 20 gallons hot water per hour.

I buy water heaters at Lowes, Home Depot, Ace.
Look for scratch and dent models.
Buy drip pan for water heater.
Wrap electric heater totally with insulation except TP valve.
Buy new flexible connectors for water lines.
Offer 15% less than marked price on tank, because the store makes money on additional items.

> Most people can install their own electric heater since you just connect water pipes and electric wire, and it's done. Read link below since there are tips that help you buy and install electric.
> Generally people are nervous about installing gas water heater, so step-by-step instructions are shown on link below. Remember gas line is under less pressure than water line, so if you can install a water pipe, you can install gas line to water heater with crescent wrench, and soapy water to check for leaks.
How to install gas water heater:
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, fixya expert speaks with you over phone while you work on water heater, or any do-it-yourself project.

Jan 13, 2011 | Water Heaters

1 Answer

How long does it take to reheat water when gas bottle runs out and then you switch to new bottle ?


water getting hot should be almost instant... it may take a minute to move the cold out of the pipes.
is your heater ignighting?
if not then you might have a small amount of air in the gas line when you changed the bottle.
you will need to bleed the line...

with the gas turned on, loosen the gas connection to the unit and let the air out until you smell gas.
tighten the connection, snug, do not over tighten.
wait about 5 minutes for the gas to dissipate before attempting to light the unit.
during this time, you can use a little soap water on the connection you loosened to make sure it is not leaking.

now go turn on your faucets, let the water run for a minute and make sure you get hot water.

if no hot water, then you might have something else wrong. you will need to let us know the error code and what the unit is doing

Aug 11, 2010 | Bosch & Tankless LP Hot Water Heater

1 Answer

We are getting luke warm water and the low gas alarm is sounding even though we have a full bottle of gas. My gas hob is working fine.


even though you have a full bottle it might not be the right bottle, you have to have a min 2lb for a water heater to work, take and have the bottle checked to make sure it is the right pressure tank

Apr 19, 2009 | Water Heaters

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