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I have a Bosch21e water heater problem is its not heating we had to switch over to a full gas bottle since then we have had no hot water any help would be great.

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Sounds like you have air in the line and needs to be bled out

Posted on Jan 27, 2009

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2 Answers

My Eternal Hybrid natural-gas hot water heater, Model Number GU195 stopped working, and gives a E02 error code. When the heater automatically attempts to burn, the natural gas doesn't, until the...


I'm having a similar problem. My water heater is Eternal GU195S. It will heat up the water it's in the tank so I will get hot water for a few minutes. Then whenever the system tried to heat up on-demand, it will not heat up and gave E02 error. If I stopped drawing water, the E02 error will go away and the temp setting I had will come back on. What could be the problem? I currently took it out of service and set it up outside my work shop for testing. Thanks.

Sep 08, 2011 | Air Conditioners

1 Answer

My fathers Bosch water wizard tf 250 will not start. the water will flow but no gas will not ignite or come through the pipe to the heater. the gas bottle is full. thanks Dave Tooley


Dave, make sure that the gas valve on the Propane tank, is fully open and that the inline gas shutoff valve near the heater is turned ON. Those are the basic two things that would prevent the gas from flowing thru the gas line, to the heater.

If the above valves are ON, the problem then lies with the gas control valve on the water heater. If it has pilot light that has to be lit, make sure that the heater's gas control valve is properly in the PILOT Position, before attempting to light it. It must be able to be pushed ALL the way in and you should feel strong pressure pushing back at you (other than spring pressure). When you feel that, it's in the PILOT Position and ready to be lit. Once it's lit, continue to hold the Pilot Button in for 1 minute, then release it. If the Pilot stays lit, turn it to the ON Position.

Hope this helped you to troubleshoot and solve the problem. Please let me know. Thanks.

Jun 22, 2011 | Air Conditioners

4 Answers

I am looking for reset code for AO Smith GPVH50 1000 water heater.Valve installed is Intellivent White rogers 184960 000, and 184960 002 on another boiler at the same location. After disconnecting Flamable...


Hi,not too sure what really prompted the problem. But you will need to still check for more posible places on your water heater to really know what causes it not to respond.

How Do I Troubleshoot My AO Smith Electric Water Heater

Troubleshooting and repairing an AO Smith electric water heater only takes a few minutes, and can save you hundreds in service calls and plumbing bills. The main indications of electric water heater problems are; no hot water, not enough hot water, slow hot water recovery, overheating and loud or unusual noises. Each of these problems has its own cause and repair requirements. We recommend calling a professional; however, you can repair most hot water heater complications yourself. Remember, if your water heater is still under warranty, or you are not sure, call the 1-800 number on your AO Smith water heater and ask for help and parts free.

Make sure the main electric circuit breaker(s) or fuses are in their "On" position inside the home's main electric panel. If a breaker(s) looks to be half on and half off, close the breaker and open it rapidly. If the breaker does not stay in the on position, replace the water heater breaker(s) and/or inspect the wiring from panel to heater. We recommend contacting a licensed, bonded and insured electrical contractor to troubleshoot the problem. In some cases, a bad breaker is a sign of trouble within the wiring system or water heater itself.
Testing AO Smith Electric Water Heater Thermostats

Turn off all circuit breakers and/or disconnect the fuses. Remove the thermostat cover plate(s) with a Phillips screwdriver. Turn the power back on.

Check for incoming power using a voltmeter. Set the meter to read 250 Volts. Touch and hold one lead wire to each of the top left and right screws of the top thermostat (or top two screws of the lower, if only one thermostat is present.) The meter should read approximately 210 to 230 volts of electricity. If no voltage is present with the breakers and fuses on, contact an electrician.

Turn on all the hot water faucets in the house until the water runs cold. This will ensure that the thermostat(s) will call for heat. Turn the faucets off.

Place one lead of the voltmeter on the top left thermostat screw and one lead on the second screw down on the right side of the thermostat. There should be 210+ volts of power. If not, turn the power off to the heater and push in firmly on the red reset button in the middle of the thermostat. You should here a click (but not always.)

Turn the power back on and check for voltage again. If no power, or limited power- fewer than 210 volts are present, check the top water-heating element for proper operation. If full power is present, but you still have no hot water after an hour or two, replace the top heating element. If no voltage, replace the thermostat.
Testing the AO Smith Electric Water Heater Heating Elements

Turn the power off to the water heater; remove the cover plate(s).

Test for incoming voltage with your voltmeter. Do not proceed until you verify that no voltage is present.

Loosen the two screws on each side of the heating element with a Phillips screwdriver.

Wearing heavy, electrical certified gloves remove each wire from the heating element and bend it slightly back out of the way.

Set your multi-meter to the Ohms position.

Place one lead on each screw of the element. The Ohm or resistance should read 12 to 16; averages are 13 to 14. If the reading is below 12 ohms of resistance, replace the water-heating element.

Reinstall the element's wiring.

Turn the power back on and test the circuit again. Reset your voltmeter to 250V. Full power should now be present. Turn the power off and replace the front cover(s).

Turn the water heater power on and wait an hour or two to check the hot water temperature at several faucets. The recovery time of an average AO Smith residential elect water heater is around 22 gallons an hour. It may take a while to reheat, depending on the size of your unit;

20 gallon 1 hour

30 gallon 1-1/2 hours

40 gallon 2 hours

50 gallon 2-1/2 hours

60 gallon 3 hours

80 gallon 4 hours

120 gallon 6 hours
Not enough Hot Water:

Calcium and other mineral buildup on a gas water heater control-valve thermostat probe will limit the heat detectable. You can clean the thermostat by removing the control valve and soaking the probe in a tall glass of white distilled vinegar and a little backing soda. Do not immerse the control valve itself; you will ruin it. Soak it for about an hour, and then rinse will with tap water before replacing.



Pilot light will not stay lit:

The most common issue with pilot lights is the thermocouple. The thermocouple is the thin copper wire, that when heated at its tip, creates a small electric charge that opens the magnetic safety valve inside the main gas control. Gas, water heater thermocouples do fail from time to time and need replaced. Older water heaters with accessible burner chamber doors are the easiest to work on. New water heaters are required to have sealed inner chamber doors and are not readily accessible. Only certified brand technicians should remove these doors. Each time the doors opened, you must replace an airtight seal. Failure to replace the seal could lead to carbon monoxide leaking from the water heater causing carbon monoxide poisoning.



The water heaters gas control valves and thermostats can also go bad. Replacing the control valve is just as critical a safety concern. If the pilot tube, and main burner tube, is not attached to the control valve correctly, gas leaks can occur.


Electric Water Heater Troubleshooting



Trouble shooting electric water heaters requires a bit of electric know how. Learning how to use a voltmeter, or multi-meter and becoming acquainted with your home electric system is most important when fixing an electric water heater. Failure to follow safe electrical practices can cause injuries and property damage.



When troubleshooting an electric water heater, keep in mind, there are only a few parts to its operating system: the heating element(s), thermostat(s), the main wiring connection junction, anode rod(s), water connections, T&PR valve, drain valve and the tank.



The most honest recommendation when repairing an electric water heater is this. Replace the thermostat(s), and the element(s), both upper and lower, if applicable, at the same time. Replacing one element or one thermostat of an electric water heater at a time causes a mismatch in the operating capacity of each part. Kind of like only replacing one battery in and electric device, it puts more of a strain on the older parts and causes premature failure. This leads to more frequent and costly repairs. Replacing all the parts at one time will help prevent future hot water heater problems and unnecessary water heater maintenance.


Water Heater Leaking



Water heater leaks are also an issue when troubleshooting a hot water heater. In most cases, you will need to replace the water heater. However, there are times when the leak is no coming directly from the water heater's tank. Leaks can also occur at a number of the water heaters connections. Before you replace your water heater, take the time to check of these locations:



Temperature and Pressure Relief valve (TP&R)- The brass safety valve usually located on the top, or near the top of water heater.

Finding Water Heater Repair and Replacement Parts

Finding water heater repair and water-heater replacement parts is not always so easy. Electric water heater repair and replacement parts are at most hardware stores, home centers and online retailers. Residential electric hot water heater repair parts are generally generic in by nature. New high efficiency, water heater parts like the ones for hybrid electric water heaters will only be available from their respective manufacturers until there is a need in the market place.



Hot water heater parts for gas hot water heaters are harder to find and often-difficult purchase. Many wholesalers will not sell gas repair parts or equipment to none licensed nonprofessionals. They feel there is a safety risk involved. However, there are online retailers whom do not see a need to limit their water heater parts sales. This is good for us, not so good for water heater companies.

Or you could simply contact them from the below link:



AO Smith Water Heater Phone Number and Contact Information

A. O. Smith Water Products Company

500 Tennessee Waltz Parkway • Ashland City, TN 37015

1-800-527-1953 • www.hotwater.com


Hope that helped

Jun 05, 2011 | Air Conditioners

1 Answer

Our controllers are set at 50 but when putting on the hot water error code 11 starts flashing we are on bottled gas and it seems to happen when we are down to one bottle


Hi where are you geographically? If your ambient temperature is quite low and the level of gas in the bottle is also quite low, then the problem could be caused by an insufficient gas supply. As you will know the gas is stored as a liquid in the bottle and requires some heat or pressure to cause boil off from liquid to gas. www.digitalcontrols.com.au

Mar 05, 2011 | Air Conditioners

1 Answer

I cannot get the water in the water heater to drain out


Are we talking about the big water heater for the whole house?-- the a 30 ro 40 gallon water heater-- one that stands several feet tall?

What heats it?-- Electric or Gas-- or what?

You have shut off the water supply to it?--

If electric:
AND THE ELECTRIC TO IT!!-- so you don't burn out the heater elements?

Can you find any drain plug near the bottom?
Some heaters have a valve at the bottom-- does yours?

Some Electric Water heaters make you remove the heating element to drain it--
You can remove the electric wires, and slip a big deep socket over the hex shoulders on the threaded type--- Or remove the bolts on the flanged type--
Which is yours?
And it helps to open a hot water faucet somewhere-- to let air into the tank, so water can run out the bottom.

If you are talking about an instantaneous water heater, it will mean opening some union fittings on the supply and return fitting of the heater-

Tell us more, so we can help more.

Mack B

Jan 18, 2011 | Air Conditioners

1 Answer

Heating system in the cabin has a heater core, where is this heater core situated in the car


Usually the heating is the circutlation of the hot water from the engine to the pipes within the blower unit so that when it is switched on the hot water flows to engage the heating.

Sep 23, 2010 | Air Conditioners

1 Answer

When you turn hot tap on nothing happens to the boiler just cold water out of tap when heating switched on pump starts but does not ignite


I think you are working on a RV water heater.
Check the reset on the unit and turn your beakers off and on.
If you are working on a gas water heater is the pilot lit.
If you can get us a little more INFO we can help you better.

May 16, 2010 | Air Conditioners

1 Answer

Gas Boiler will supply /fire up to supply Central heating When Room thermastat turned up and switched to Heating and Hot water. When on Hot water Only will not fire up even though thermostat on hot water...


most likly or a shorted wire unhook the wire from the boiler see if it stops then if it's still is on it's in the boiler if off try unhooking it at the t-stat on the heater this should narrow it down for you dan

Jul 19, 2008 | Air Conditioners

1 Answer

NO HOT WATER UNLESS HEATING IS ON


Some Hydronic heating systems have a loop for hot water. If you only have hot water when the heat is working then your normal hot water heater is out of the circuit. Breaker off, or problem with the normal water heater. These can be ether electric or gas.

May 01, 2008 | Air Conditioners

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