I did try light pilot and it started. Show More. Thermopile laser sensors (Fig 1) are used for measuring laser power from a few µW to several W (see section 2.4). The pilot is lit and I hear the burner kick on sometimes. Ask Your Own HVAC Question. c. Figure 3: Thermopile near Its Damage Threshold Caused by Moving Sensor during Measurement d. Figure 4: Thermopile Damage as the Result of Too Low of a Power Density e. Figure 5: Severe Thermopile Damage Caused by Too High of a Power Density f. Figure 6: Damaged Caused by Too High Total Power Level and Density g. I did try light pilot and it started. ( Log Out /  Pull back the insulation to expose the thermostat. Michael Joseph has more than 20 years of hands-on experience as an avid home handyman and had 10 years in the construction industry, specifically in the field of HVAC. WTF!! It needs to since the coils in gas solenoids are pretty low resistance. We brought our new baby home, and installed a water heater tank for the second time. What should be my next step? Set the gas control to pilot lighting setting and light it per the manufacturer’s instructions. Schedule a repair. Thermopile voltage should stay above 400 MA with the added main coil load. The Eastman thermopile is a replacement part for The Eastman thermopile is a replacement part for self-powered gas appliances such as pool and spa heaters, gas furnaces, water heaters, and gas fireplaces. Operating voltage down to 2.4V Low current consumption Isothermal sensor housing Applications Ear thermometry General purpose thermometry DigiPile Thermopile Sensor TPiS 1T 1252B / 5058 Revision - Date: 2016/09/01 S n The DigiPyro® PYD 1998, with its 5.2 x 4.2 mm² window However, it would be difficult to say for sure if this will work with your system. Sure enough, that pilot light went out, and Sam had relit it. ( Log Out /  Contractor's Assistant: Do you know the model of your Rheem water heater? Each additional thermocouple placed in a thermopile increases the device's ability to produce electricity. Without any problems, Home Depot accepted our return, and we got another new tank. and waited some more for the light to go out. All you will need to get started is a multi-meter that can read for millivolts. All Parts in stock and ready to ship. The pilot is lighting and staying lit, but when I jumper the line and load terminals on the valve it won't turn on. That’ll show them! When it comes to your hot water heater, the pilot light heats up the thermopile. Water Heaters - Thermopile low voltage on water heater - I have a State Select Water Heater with a Honeywell Control system with Advanced Diagnostics. Then I turned valve switch and gas start flaming. Therefore, if it has been shown to be linear up to full power – as it has - it will necessarily be linear at very low powers and if the calibration is correct at low powers, it will remain correct at high powers as well. Generator output is less than 500 mv. A thermopile generates much more millivolts than a thermocouple and one could not be used in place for the other without changing the gas valve. Voltage drop across the switch terminals Burner on: 35 mv or less. If the new valve is basically the same model as the old one, you don’t need to pay a plumber to replace the evil valve. If ventilation is restricted, the water heater will not function properly. These sensors contain material that creates a small amount of voltage when heated. Enter your email address to follow me and receive notifications of new posts by email. I understand parts are pretty much nonexistent for these old stoves and i'm thinking of replacing the entire gas valve,pilot, thermopile and thermocouple if the thermopile … If the burner is sluggish, or if it does not ignite at all, your thermopile may not be providing enough electricity due to an issue with the wiring. Low millivolts from a thermopile As you can see from the picture above, my thermopile was putting out .358 volts, or 358 millivolts. long thermopile with spade terminals is equipped with a push-clip for easy installation. Chat (offline) Sears Parts Direct. The unit had low power. Check all wiring connections. Thermocouples and thermopiles use the principles of thermoelectricity to generate electricity by measuring temperature. We turned up the heat to low, and let it temper for a while. Tried to re light the pilot twice-- nothing. It's what you find in those in-ear infrared thermometers or remote temperature probes used in the food industry. Ok, so that’s less than 1%. The product fit perfectly and screw snuggly into place. How to Determine if a Fireplace Thermocouple Failed. And after 5-7 seconds gas valve Honeywell shutdown – with […] And with this world full of videos and how to tutorials, I feel like the world is my oyster! Same model, just switched it out. It burns evenly until the gas valve shuts down. The math … Update June 2019: For those looking for a solution to this problem, we ended up un-installing our new water heater, hauling the entire tank back to Home Depot, and switching it out. You should also match the impedances seen by the inputs and add some low pass filtering to an amplifier with such a high gain. long thermopile with spade terminals is equipped with a push-clip for easy installation. I did check pilot generator – it was good. A digital recording thermometer is my choice here. The official error was “Thermopile Voltage Low”. My 50 gallon AO Smith LP gas water heater is flashing twice, which indicates that the thermopile voltage is low. You will notice that it is done when the reading on your multi-meter slows down. The next day, Sam got a hold of a Rheem service tech. The next day… we got an e-mail, not a call, letting us know that there was no service rep available in our area, but if we would like to contact our own plumber, they would reimburse us up to $150 for the house call. If other people can create and build, so can I! It’s almost time for you to celebrate your victory with a long, hot shower. The thermopile will leave the generator of your system working like brand new in minutes! We turned on the pilot light, celebrated for a minute or two in our utility room, and headed back upstairs for the night. So we decided to drain that stupid tank, and return the damned thing. possible that the thermopile is not producing enough millivolts to power the control circuit. The Honeywell Thermopile is compatible with the majority of millivolt gas valves. They produce enough current to power up a small circuit board, used in conjunction with a more modern electronic gas valve. *If higher than 35mv check connections and switch. So the valve control circuit should be able to deal with input voltage range 1 - 1.5 V. Not sure that your can achieve this goal with a single MOSFET circuit; there are many power MOSFETs with low resistance at Vgs > 2.5 V, but it may be hard to find a power MOSFET with low resistance at Vgs = 1 V. Receive notifications of new posts by noravista enter your email address to follow me and receive of... Knob until the light to go out red positive lead to the setting is low, the process relatively. Cooling or bias 2 Flashing red lights ) -- turned off for while! – replace pilot assembly Insufficient power to operate the gas control valve until the gas control.. Setting and light it per the manufacturer of the laser is converted into heat energy at the surface, we! The open-circuit test reads below 400 millivolts, then the thermopile handy,... Getting old and harder to move flame when testing it this will work with your own thermostat until. 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