Like to welcome you to our digital classroom brought to you by HD supply I’m Jerry Winslet along with Jason Leonard everybody and today what we’re gonna be talking about is gas water heaters particularly we’re going to talk about troubleshooting gas water heaters but before we start I just want to tell you a few things if you have questions about anything we’re covering here today you can use a chat feature which is on the right-hand side of your screen on the other side of Jason over there just type in your question we’re going to have a question answer session at the end of the program you know you don’t have to wait till the end of the program you can do it any time during the show also we’ve got something new we’ve got a couple of things that are down below the screen here we’ve got a couple of PDFs that you can download and it’s really cool because what you can do with these PDFs is you can follow along with us as we go through the troubleshooting we’ve got step-by-step instructions on what we’re going to be covering today so you can download this follow along with us you can use it whenever you go out to the job site it’s a it’s a you know all detailed out yeah it’s a great resource.
I mean you print these out keep them with you you can watch the show learn everything that we’re going to tell you to do but you may forget some of these smaller details print this guy off keep this with you keep it in your service truck keep it in your office keeping it wherever you need to if you run into one of these issues you’ve always got this with you step-by-step process of how to resolve those issues yeah and there’s also at the bottom of that PDF there’s also our the website where you can go to where you’re at right now you can always go to that the website and we’ve got a number of different videos on that website but let’s go ahead and talk about gas water heaters and troubleshooting but first you know we we’ve got you know a gas water heater we’ve made a couple changes over the past couple of years on how the they operate in really we’ve got a couple different gas valves up here let’s talk about the gas valves and what kind of makes sets them apart first off they.
They’re different looking I know that they are in depending on you know the year of the heater this you’re working on you’re going to see one of these two styles this is the mechanical version this is the electronic version of course this change kind of happened for us around 2010-2011 right so if you’re looking on a heater about that age that’s where you’re going to start to see this transition between the mechanical and electronic we’ll start out with the electronic and just look at some of the differences if we can get an overhead we can kind of see one of the big differences you’re going to notice is the temperature probe that sticks into the water these are the temperature probes here this is our mechanical style here’s our electronic this is the part that actually reads the water temperature okay you can kind of think of this in terms of digital and analog right the older style was more analogue wasn’t quite as accurate as of course the digital style what we’re looking at here this is your old rotten tube style temperature probe is what it’s referred to as this one’s a little bit shorter you’ll notice that’s.
Because the only thing inside here is a thermistor okay again we’re taking this temperature electronically that allows us to get a little bit more accurate in that water temperature so this is our digital this is what’s this do or be able to get more accurate at temperature readings on this one that’s exactly right it runs a thermistor and thermistor you can actually get to about a tenth of a degree oh really now this one is what’s referred to as a drywell thermistor which means thermistor itself doesn’t actually contact the water tails inside this housing but that allows us to get a about a two degree differential on temperature so we’re definitely getting very accurate in terms of temperature control where this one the parameter is a little bit wider because again it’s an analogue style so you just can’t get that accurately okay and another thing too I noticed that we had two knobs on this control and we just went to one knob with the electronic yeah that’s the other difference on this one here you’ll see that this one has one knob and this knob kind of does are off or on or pilot everything you may see this one with a red knob also there may be two knobs on top there could be a red one here that would be your pilot / okay.
This one just happened to have all of those incorporated into one so you may see either one of those two style on the electronic you see that everything is right here on the front of the dial here we have our temperature control on the mechanical style and our pilot and off and on everything here on the electronic is housed inside this one switch right this one dial we can push in on this this gives our pilot purge then we turn it to on and then of course at our temperature control everything is doing with this one dot instead of multiple dials okay little bit easier for the end-user as well if they need to make adjustments and those thing or relight a pilot or some write that just a little bit easier for them and another thing too that has changed is with with the newer style we’re able to have status codes which is different because with the older style we weren’t able to do that let’s talk about status codes and what they mean really yeah that’s really the the big deal with the electronic gas valve because it is electronic now it has the ability to communicate with you a little bit if we have an issue with the valve with the mechanical style there was no way to know we’re out physically going in running some diagnostic tests seeing some numbers that would tell you what was going on with it this valve actually has the capabilities of doing its own diagnostic testing there’s a board on the inside that’s monitoring the control and if it sees a failure or a fault or something like that.
It can actually throw a flash code if we can look at the front of the valve we can see that there’s a status light right there now what’s going to happen is that status light will blink in a normal operation it’s going to blink as well it gives what we refer to as the heartbeat rash they just let you know that everything is fine if it goes into a status code then you’re going to see a different series of light say an error code to is going to give you a two flash and a three-second pause to flash three-second pause but again the valve is a lot smarter you can communicate with you a little bit so if we have some of these internal failures or something the valve can tell you that right you have to do the test on your own right and and one of the things about the code though the only way you can have a code is if you have a pilot that’s exactly because you know we have to we don’t plug these water heaters in and we have to generate enough electricity to run that the gas valve so let’s talk about how we run the differences between this water heater and the older mechanical style how we’re generating that power sure as you stated we don’t plug this water in right traditionally atmospherically been in water heaters do not need to any type of wall outlet or anything like that now once you go to an electronic control then of course we wouldn’t have to have a little bit more power right if we’re going to run things like status lights those type of things and we’re going to have to have more power than the old mechanical stop now as we stated they don’t plug into the wall.
So they need their own internal power source okay now for decades that’s been done with what’s called a thermal couple right on the mechanical style gas valve and we have one right here this is just a standard Honeywell 24-inch thermocouple right this was the standard for decades and decades and decades this is what ran the older mechanical style valve now the way this thing works if we can go to an overhead this area on the end here this is the area that would sit inside the pilot flame okay okay so once we get the pilot lit this is going to be sitting inside the pilot okay the other end that we see here this is the end that attaches to the gas valve itself okay so we get some power generated from the tip of this we’re basically turning that heat energy into electric energy okay that gets converted throughout the length of the thermocouple so that pilot is going to start to heat up this tip produce millivolts okay.