- 1 Why does my pilot light go out when I turn it to on?
- 2 Why do pilot lights go out on hot water heaters?
- 3 Why does my water heater burner won’t stay lit?
- 4 How do I know if my thermocouple is bad on my water heater?
- 5 What are the symptoms of a bad thermocouple?
- 6 Will a pilot light stay lit with a bad thermocouple?
- 7 Can you get carbon monoxide poisoning from a pilot light?
- 8 How much does it cost to replace a thermocouple on a water heater?
- 9 Should pilot light always be on water heater?
- 10 How do you fix a gas burner that won’t stay lit?
- 11 How do you check if a thermocouple is working?
- 12 How long does a thermocouple last on a water heater?
- 13 Can you clean a thermocouple on a water heater?
Why does my pilot light go out when I turn it to on?
If the pilot light goes out, the thermocouple senses the drop in temperature and signals for the gas valve to close. If you have a faulty thermocouple is the most common reason that your pilot light is malfunctioning. Over time your water heater will collect dirt, dust and other kinds of debris.
Why do pilot lights go out on hot water heaters?
Some of the most common reasons that water heater pilot lights go out include: A faulty thermocouple. Over time, thermocouples can begin to malfunction and shut off the gas supply to the pilot light even if it’s burning properly. A bent or dirty thermocouple.
Why does my water heater burner won’t stay lit?
Thermocouple. If your gas water heater doesn’t stay lit, you may have a defective thermocouple. Most gas fired water heaters use a standing pilot to ignite the main burner. Verify that the pilot flame is clean and contacts the end of the probe fully before condemning the thermocouple.
How do I know if my thermocouple is bad on my water heater?
If the pilot lights but the flame goes out as soon as you release the button after holding it for 60 seconds, then the thermocouple is bad. It’s possible to replace the thermocouple without removing the burner assembly, and many repair people do this.
What are the symptoms of a bad thermocouple?
Failed Thermocouple Symptoms
- Signs of contamination on the tube, e.g. discoloration, cracks, or pinholes.
- Signs of wear or corrosion of the wirings, e.g. missing insulation or bare wire.
- Physical damage to the connectors which can have an effect on the reliability of the test reading.
Will a pilot light stay lit with a bad thermocouple?
A thermocouple senses the heat of the pilot and allows gas to flow to the burner. A bad thermocouple will shut off gas to both the pilot and the burner so the pilot light won’t stay lit.
Can you get carbon monoxide poisoning from a pilot light?
A pilot light should be a crisp blue colour. A yellow or orange pilot light will produce carbon monoxide – an odourless, colourless gas that can fill your home and cause carbon monoxide poisoning. Symptoms of this condition include dizziness, headache, fatigue, nausea, unconsciousness, brain damage and death.
How much does it cost to replace a thermocouple on a water heater?
Thermocouple – $20 to $150 The thermocouple is an apparatus that senses whether the pilot light is lit and triggers the gas control valve. Repairs typically cost about $150 to have it done professionally, though a new thermocouple itself only costs about $20 on average.
Should pilot light always be on water heater?
The pilot should be on the water heating the house. The pilot flame can be difficult to see through a window. To know if the pilot is on or off, you need to remove the access door and shield and look at the burner and pilot through it.
How do you fix a gas burner that won’t stay lit?
- Push the control knob down and turn it counterclockwise to the maximum position, don’t try to ignite the burner on a minimum position.
- After you have lit the flame, keep the knob pushed for equal or less than 10 seconds.
How do you check if a thermocouple is working?
If the thermocouple is working, you should be able to measure 30 to 40 millivolts of voltage at the connection end of the tube when the pilot flame is on. You can test this yourself using a multimeter, but you may need a helper to keep the pilot flame burning while you do it.
How long does a thermocouple last on a water heater?
All things considered, the question remains, “How long should my thermocouple last?” The answer to that question is that it depends on the application. In an ideal environment, that length of time can be indefinite.
Can you clean a thermocouple on a water heater?
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.