Hot Water On Demand

How to Identify and Resolve Common Issues ?

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Check the gas valve and ensure that it is open, and that you have paid your gas bill. Check all sensors, wiring fuses, and electrical components to ensure they have not burned out. Ensure there is no condensation or debris on the burners that may cause them to not ignite.
In many cases, the reason that you can`t get your pilot light to ignite is that the pilot tube is clogged. This is a small metal tube that supplies the gas needed to ignite the pilot and keep it lit. The pilot tube often becomes clogged with debris, and this will prevent gas from flowing to the pilot light.
Inside the tankless system, a burner ignites when the system signals a need for hot water. The cold water passes over an aluminum heat exchanger and heats the water directly. When the hot water is shut off, the system goes into standby mode.
Tankless water heaters also use a burner lit by electronic ignition, so there`s no standing pilot light. The best indicator of a heater`s efficiency is its Energy Factor (EF).
If the pilot flame ignites but goes out after you release the gas control knob, the cause may be a dirty or defective thermocouple. If the gas is on but the flame will not ignite at all, a pilot tube obstruction is the most likely issue.
Yes, you can clean a thermocouple, but the task must be done with a light touch. Remove the thermocouple from the process assembly, using a steel wool or emery cloth, lightly clean the tip removing any build up. Cleaning a thermocouple is not a fix for an issue, such as inaccurate readings.
If gas is coming out of the pilot, but it still won`t light, the spark igniter could be the problem. Alleyne says to look for and clear out any debris between the igniter and thermocouple. 4. The pilot lighting, but not staying lit, indicates that the thermocouple is worn out, Worthen says.
Cleaning the thermocouple

You can use Emery cloth sandpaper to gently clean any debris or build-up from the end of the thermocouple. If present, you should also clean off any corrosion where the power wire connects to the thermocouple terminal.

After igniting the burner, the Coleman hot water system will produce hot water almost instantaneously. It has the capability to deliver up to 150 litres of water at a maximum of 50⁰C from one Coleman LPG bottle. The Coleman hot water system is a great resource for all camping shower needs.
The commonest complaint we get with tankless water heaters is that they don`t seem to provide hot water as quickly as expected. Like most tankless water heaters, if your water heater does not have a buffer tank or a recirculation pump, it may take a minute or two for the water to heat up before it comes out of the tap.
Required minimum flow rate.

In order for the heat exchanger — the system part that warms the water — to activate, a tankless water heater must have a 0.5 GPM minimum flow rate.

Most tankless water heaters have a front-facing panel that allows you to control their settings. If you have a gas-powered tankless water heater, that means the ability to adjust the gas value, and for electric tankless water heaters, it means controlling the amount of electricity being used.
Modern gas-fired tankless heaters don`t even have a pilot light! They have automatic electronic ignition to save even more energy.
Changes in temperature can cause regular expansion and contraction in metal, which will cause thermocouples to weaken over time. After enough time, metal fatigue can cause a thermocouple to break.
A working thermocouple will give a reading of between 25 and 30 millimeters. If the reading is less than 25 millimeters, it should be replaced.
One of the most common issues is that the thermocouple can get dirty. This will cause the thermocouple to make improper readings, which can shut off the gas supply to your furnace prematurely or prevent gas from reaching your furnace in the first place.
Touching an exposed thermocouple allows you to become part of the circuit. It`s likely that you either change the biasing for the thermocouple or affect the circuit in some way. To prevent this, make sure that the thermocouple has some sort of cladding or insulation around it.
Normally when the thermocouple malfunctions or isn`t working, it simply shuts off the gas to your heater. This is important, particularly if the pilot light is out, because it prevents harmful gas from leaking into your home.
If your water heater is electric, it does not contain a thermocouple. However, if your water heater is gas-powered, you know by now a thermocouple is indeed part of its makeup. Yet with today`s technological advances, some newer gas water heaters no longer contain a thermocouple.
The thermocouple on a water heater is what relays the gas control valve once the pilot light is lit to trigger it to turn on. The part is rather small and inexpensive, but replacing it requires the expertise of a professional plumber for safety reasons.
If it doesn`t have the button, or the button fails, press the regulator valve and hold a grill lighter or long match to the pilot light valve until the pilot ignites. Hold the button down for up to a minute to ensure that the light stays lit.
* Caution: Most modern water heaters no longer use standing pilots. They use electronic ignition to ignite the gas. Do not attempt to manually light an electronic ignition system.
However, many times the issue of the water heater pilot light being lit but burners failing to ignite can be fixed on your own. The three most common reasons for this happening to you are 1) a defective gas valve, 2) a rusty thermopile, and/or 3) the automatic shut-off not working as it should.
Your gas hob might not ignite properly if spilled food or dirt is clogging the ignition nozzles. Ignition may also fail if the nozzles, burner caps or ports are wet after cleaning. Dry the hob and the burner tops thoroughly after cleaning them.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Coleman hot water on demand
ANSWER : Does anyone have a AC charger for the Hot Water Heater on Demand? I would be willing to buy one.

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Water system in my Coleman pop up not working
ANSWER : There is a 3 port valve conneted to the incomming water line (white usually). It is actually a check valve to keep the outside water from overfilling your tank. Verify it is installed correctly.

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What is the pumping rate (volume) of the Coleman Hot Water on Demand water pump?
ANSWER : I recall 3 and a half liters per minute. More than the Primus and the Cube

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I have a volvo penta md7a marine diesel engine fitted in my sailing boat. Recently, I changed the bottom sea **** which was almost blocked. Apparently the new sea **** is working well as it should. But this week with no apparent reason and without use of engine, I noticed that the cooling system water cup (the recipient which connects with the sea **** hose and the water pump hose) is empty and it Im not able to keep it full like it was before.The water vanishes every time I tried to fill it up in order to keep the water running throught the system. However the waterpump seems to be working. But almost no water is coming out of the exhaustor, of course, just a few drops once in a while. What might be going on ?? Thanks.
ANSWER : I don’t have a picture of the installation, but I can imagine a water filter above the water line with an improperly fitted cover and an air leak that lets the seawater drain out – losing the prime. Old Swampy in New Hampshire

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Hi i have a Coleman hot water on demand and the water wont heat up past luke warm, help needed please
ANSWER : Need to restrict the water input so it does not flow through so fast

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Mar 12, 2010 – Could it be the check valve? I took it off and the flap appears to be working correctly. This well has been here a long time. Never given me any problems. I do have galvenized couplers on the discharge and intake sides. Old. Could these be leaking even though they show no sign of water? The discharge is able to hold 30 pounds easily overnight. I do not hear any vacuum in the intake when I take it off. Could the pipe to the well have a leak? I know I would have to insert a sleeve bnut I do not want to go through the hassle if I do not have to. I had put on a brand new pump from the hardware store that did the same thing so I think that would elliminate the pump as being the problem.
Mar 12, 2010 – I have a 3/4hp flotec convertible jet pump. It is able to hold 30lbs pressure on the discharge side as the primie easily for 24 hours. It is not able to pull water from the well whcih has been here for years. i disconnected it for the winter and rehooked it up. The galvanized couplers on the discharge and pump side are old but do not appear to be leakeing as I taped them well. The check valve seems to be functioning well as I took it off and the flap works correctly. The well is not pulling watrer. there does not appear to be a vacuum on the check vale when I losen it. could the check valve be bad? I am aware I might have to resleeve the well, but do not want to hassle with this if I do not have to. I want to eliminate everything else first. i put another brand new pump on it to see if it was that. That partiuclar pump which was the same thng did not work either.

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ANSWER : Your well has gone dry it seems. It has happened to my before. At first the new pump I purchased that did not pump I took back for exchange and still no water. I finally gave in and called the well experts and I was told the well was dried up

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Our coleman hot water service pump wont work. It has not been used for 18months and we went to use it yesterday and the pump is not working. Is there anything we can do?
ANSWER : Unfortunately it sounds as if the pump motor has seized. After some time the water left in the motor starts to corrode the parts. The only remedy for this is to replace the entire pump assembly.

I hope this is useful.


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