Question about Terminator Aquastar 125FX Tankless Water Heater: FX Hood Horizontal Vent

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Burner will not always light

Unit is 5 yrs old. Turn on water 7 fan goes on, pilot lights for 2 seconds & goes out for 1 second & back on for 2 seconds & repeats the cycle but doesn't light. Some times turning faucet off & on works but not always. Some times we just wait & come back later & it works. Some times it will go out while showering ..Brrrr. Have cleaned the cold water inlet screen but may have to replace it. We are on a well. Any solution?

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Clean the flame sensor!!

Posted on Jan 19, 2009

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Gas Hot Water Tank Not Producing Hot Water Pilot will not stay lit Trying to...


Gas Hot Water Tank Not Producing Hot Water

Pilot will not stay lit



Trying to light your pilot light and it keeps going out when you turn on you gas valve. This is a common problem when your thermo-couple goes out. The thermo-couple sends a small electrical charge to the gas valve to keep its self lit. When the unit calls for heat the pilot flame gets bigger producing more electric and tells the gas valve to open the main gas valve to the burner tubes. The thermo-couple is an easy item to change most of the time. You will need to follow these steps to change out your thermo-couple:

1. Turn off the gas (there is an inline shut off on the supply line before it reaches the gas valve, you need to turn this crossways to the pipe)

2. Locate the thermo-couple it will look like this and be attached to the gas valve

3. Unscrew the thermo-couple from the gas valve

4. Remove the other end of the thermo-couple from the pilot holder

5. Measure or take the old thermo-couple to the hardware or appliance store with you to get the proper length (there are many different lengths of thermo-couples)

6. Reinstall the bulb end at the pilot

7. Reinstall the threaded end on the Gas Valve (make sure not to cross thread the thermo-couple it should start by hand)

8. Turn the gas valve to the pilot position and hold down the red button wait a few seconds then turn off and do again (you will need to do this around 5 times in order to get the gas back up to the pilot light then try and light the pilot)

9. Try to ignite the pilot light.

10. Once you get the pilot light lit you will want to hold down the button for 60 seconds then turn the gas valve to the on position.

Here is an image of a thermo-couple (they will all look similar to this):

justinbur167_3.jpg




Thank you for choosing FixYa.com. If you have any further questions please post them and we will gladly answer them

Justin

on May 03, 2011 | Plumbing

3 Answers

U can light the pilot lite,turn 2 ON it will stay lit 4 a couple of minutes then go out? If u turn the knob 2 low,med. It goes out pretty much immediately?I changed the thermocouple,blew the lines ou


Is the thermocouple secure, routed properly, no kinks, no sharp bends? Is the end of the unit properly aligned so the hottest part of the pilot flame is hitting the unit. Did you hold pilot switch in the light position for at least 30 seconds, before you set the gas valve to on? If all above OK, try this. Light the pilot using barbeque lighter once it lights keep the lighter on the t-couple for 30 seconds, then set the valve to ON and keep the lighter where it is. Once the main burner lights, remove the lighter. If the burner and pilot go off, your gas valve is bad.

Feb 17, 2015 | Rheem Richmond 75 Gal Natural Gas 6 Year...

1 Answer

How can we ignite the pilot switch


The directions are on the inside cover of the water heater as well as on the paperwork you received with the unit.
If you have none of these, get the make and model number of the unit and look it up on the internet.
General directions to light a gas appliance:
1.Turn the switch to, "Off"
2.Remove the 2 panels at the base of the unit.
3 Identify the pilot device.
4.Get a long lighter or match on a stick that reaches the pilot.
5.Turn the gas knob to the, "Pilot" position
6.Light the match and put it next to the pilot while pressing down the knob
7. Keep the knob pressed for about 45 seconds after the pilot lights
8. Let go of the knob so it's in the, "up" position
9. Turn the knob to the, "On" position
-the water heater should fire up in under a minute.
10. Put the metal panels back into position.

Jul 14, 2014 | Honeywell VR8200C6008

1 Answer

I have. A 40 gal. 40,0000 btu natural gas , how do u lite the pilot light


Access is at the bottom of the water heater. There is a little cover you will have to take off. Look for the gas valve. (its where the gas will come in to the water heater) Follow the two lines that come off he bottom of the valve. They will lead you to the burner (big line) and the pilot(smaller line). The pilot is what you are looking for.
1. locate the pilot (it will be 8" or so in to the water heater)(right next to the burner)
2. Turn knob on top of gas valve to "pilot"
3. Push down the knob on top of the valve that you just turned to "pilot" or there may be a lever right next to the knob on some models
4.with a long fireplace match or bar b que lighter, while holding the knob down, reach your lighter to the pilot assembly. you may smell a little gas.
5. The pilot will light, do not let go of the knob for 30-45 seconds
6. After a few seconds let go of the knob and turn it to "on"
7. Check your thermostat make sure it is not on "vacation" and turn it up to see if the burner ignites.
You are ready for hot water if all works. Hope this helps you, have a good day.

Apr 18, 2011 | General Electric Water Heaters

1 Answer

I have a richmond 5v40-36f water heater & when i light the pilot it stays on for 20-30 seconds,then when i turn it to ON it lights the burner for 3-5 seconds then goes out,i replaced the thermacouple...


Do you have a natural gas or propane water heater. You could possibly have a dirty valve which stops the flow of the gas. Has there been a change with the environment of the water heater. Check for the draft and back blow of the available air. If the water heater is over 6 years old maybe it is time to replace the unit. Good Luck

Jan 08, 2011 | Audiovox Richmond 6G40-36F 6-Year Tall Gas...

1 Answer

I have a Rheem Power Vent propane water heater model3 21VP4OE-1P that is acting up. The pilot lights and then the burner lights, but goes off after 5 - 10 seconds. It cycles like this 2 or 3 times, then...


check the thermal coupling for the pilot light. if it goes out it will shut down gas supply, its a safety feature to put out pilot light if the thermal coupling is bad. to prevent gas from leaking and causeing a fire. check coupling.

Aug 12, 2010 | Water Heaters

2 Answers

Pilot light keeps going out


Either the pilot light orfice is dirty, and you will need to pull it out and clean it, or the thermocouple is bad. If the pilot goes out as soon as you let the button go then it is most likely the thermocouple. If the pilot stays lit for a few days or hours then you will need to clean the pilot orfice, heres how:
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4 unhook the thermocouple from the thermostat
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7 reassemble and light pilot

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1 Answer

When the main burner turns on, it shuts off after a few seconds


You have a venting issue. Either the vent is blocked or there is combustion air entering back into the heater. Call a qualified technician right now!

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1 Answer

I have a coleman propane furnace in my home that is 30 yrs old. you can light the pilot but when you turn up the thermostat so that the burner will light and the fan will blow the pilot goes out after a...


watch your flame on the burners and see if the flame changes when the blower starts if it does and makes the flame jump around you have a busted heat exchanger

Nov 22, 2008 | Heating & Cooling

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