Can You Bypass A Thermocouple On A Water Heater?

Can I bypass a thermal switch on water heater?

What can happen when the thermal switch on newer gas water heaters is bypassed with a wire nut.

If the 2 wires that went through/ to the thermal safety are now connected to each other with the wire nut, that is definitely not a safe thing to do, you never bypass a safety except in testing, diagnosing etc..

How do I know if my thermocouple is working?

Turn your multimeter to millivolts to perform an open circuit test. Place one of the test leads of the multimeter on the side of the thermocouple and the other to the end that enters the gas valve. Ignite a lighter, or other heat source with a flame, at the opposite end of the thermocouple.

What does a thermocouple look like?

The thermocouple looks like a piece of metal tubing smaller than a soda straw. To find it, first locate the gas control box. This is the box that the main gas line enters, where you turn the gas on in the furnace. (On most furnaces, it also houses the button that you hold open or push to relight the pilot.)

Can you overheat a thermocouple?

If the back end of your thermocouple bulb gets constantly overheated, it will fail. With excessive back pressure coming from the burner ports, thermocouples can get burned up quickly.

Can a thermocouple work intermittently?

Intermittent break in old thermocouple. Bending or expansion causes an open circuit. Draft condition that was corrected by the plumber (misplaced vent louvers, covers, etc.) The thermocouple measures okay, open circuit, but not under enough load to actually drive the valve.

How do you test a thermocouple continuity?

Check for continuity by using a multimeter set up to measure ohms. Connect the multimeter test leads to the 2 thermocouple leads (polarity doesn’t matter for this test) and if the meter reads 0 or open circuit, then at least one of the thermocouple leads are broken.

Can a thermocouple be bypassed?

So if you want to bypass the thermocouple you have to get rid of the spring mechanism. You can bypass the spring mechanism by simply using a screwdriver to pop out the little e-clip and take the valve off and problem solved.

What causes a thermocouple to fail?

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. … If thermocouples start to give out unusual readings, it may be suffering from metal fatigue.

What causes a water heater reset button to trip?

While a bad thermostat is the most common reason your water heater’s reset button may trip, it’s not the only one. … But a short in the element is causing it to continue to heat your water. Loose wiring—A loose wire in the water heater can generate heat that can cause the high-limit switch to trip.

Will a pilot light stay lit with a bad thermocouple?

The job of the thermocouple is to keep the pilot lit. It does this by sending a tiny electric current to a sensor on the gas valve signaling the valve to stay open. … Nothing lasts forever, and when the thermocouple wears out, the pilot won’t stay lit and your appliance won’t work.

Can I remove the thermocouple?

The thermocouple is usually attached to the pilot gas supply tube with one or more clips that snap into place. The end of the thermocouple is inserted into the pilot assembly and can simply be pulled out. Take the detached thermocouple with you to the home center or hardware store and buy a new one.

Are thermocouples universal?

Universal Thermocouples. Universal thermocouples, as the name implies work on most water heaters. They are available online and in home supply stores for a reasonable cost. The length and the thread type are the two concerns when purchasing one.

What does it mean when the pilot light keeps going out?

Usually, a problem with the thermocouple causes the pilot light to go out. The thermocouple is the small copper rod that the pilot light hits. The thermocouple’s job is to shut a gas safety valve if the pilot light goes out. That’s important because gas is always being supplied to the pilot to keep the flame lit.

How long does a thermocouple last on a water heater?

one yearIn effect, new thermocouples were installed into contaminated tubes, causing the degradation of the sensors and generating greater than a 100°F shift in accuracy. In this scenario, thermocouple life, which should have been close to one year, was shortened to within a week.

What are the symptoms of a bad thermocouple?

Failed Thermocouple SymptomsThe first is signs of contamination on the tube, which can include discoloration, cracks, or pinholes.Next, check the wiring for any signs of wear or corrosion like missing insulation or bare wire.More items…

Can you replace a thermocouple yourself?

It’s easy to replace and a new one costs $5 to $10. Rather than trying to unfasten the thermocouple inside the water heater’s burning chamber, it’s easier to remove the whole burner and thermocouple assembly. … Then unfasten the three nuts that hold the thermocouple and the two gas tubes to the valve.

Can you fix a thermocouple?

If the pilot remains lit, but the main furnace doesn’t stay lit, it’s time to replace the thermocouple. Replacement thermocouples are in stock at most hardware and home improvement stores. Because they come in different sizes, take your faulty thermocouple to the store with you so you can make a correct match.

What causes the reset button to trip on a gas water heater?

A short in one of the heating elements allows power to flow through the element even after the thermometer shuts off its power. This means the heating element is still working and will continue to increase the water temperature, eventually tripping the reset button.

What’s the difference between a thermopile and a thermocouple?

The main difference between Thermocouple and Thermopile is their method of measurement. The thermocouple is a thermoelectric instrument, while the thermopile is an instrument that modifies thermal energy into electrical output.

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.