Great video and highly informative. I reviewed my BradfordWhite service manual which says the following in regards to diagnosing the heating ellement: "Reading should be 12.8 ohms (±6%) for a 240volt, 4500 watt element. A reading outside the range using the formula above (±6%), indicates a bad element and the element must be replaced." So I checked both upper and lower elements and my multimeter shows 12-13ohms initially and as I held the multimeter on the contacts the reading dropped to 9.5ohms after 4-5secs. Im not sure whether to go by the initial 12-13ohm reading or the 9.5ohm reading 5secs later. Do you think I have a problem here? The heater is the M250S6DS-1NCZZ and id about 15 years old. Thanks in advance for any further info.
I am not the expert here, but if the element is blown it should read as an open circuit and read infinite ohms. It might be that as the element ages, the resistance might change. V(voltage)=I(current) * R(resistance) therefore V/R= I. What this means with your reading is that the current would be a bit higher through the element since V(240) and R(9.5) are known things. I would think that if that current is not tripping the breaker, its fine.
There are typically two thermostats so it would be helpful to eliminate one or both as problems. I’ll look elsewhere for more definitive help with the thermostats
What if my water is hot for about 5 minutes and then it suddenly turns cold?
Great video and highly informative. I reviewed my BradfordWhite service manual which says the following in regards to diagnosing the heating ellement: "Reading should be 12.8 ohms (±6%) for a 240volt, 4500 watt element. A reading outside the range using the formula above (±6%), indicates a bad element and the element must be replaced." So I checked both upper and lower elements and my multimeter shows 12-13ohms initially and as I held the multimeter on the contacts the reading dropped to 9.5ohms after 4-5secs. Im not sure whether to go by the initial 12-13ohm reading or the 9.5ohm reading 5secs later. Do you think I have a problem here? The heater is the M250S6DS-1NCZZ and id about 15 years old. Thanks in advance for any further info.
I am not the expert here, but if the element is blown it should read as an open circuit and read infinite ohms. It might be that as the element ages, the resistance might change. V(voltage)=I(current) * R(resistance) therefore V/R= I. What this means with your reading is that the current would be a bit higher through the element since V(240) and R(9.5) are known things. I would think that if that current is not tripping the breaker, its fine.
Nothing about thermostats. Oh, dear.
Yes. That was disappointing
Yes. That was disappointing
He mentioned it, he said if the element is working, then by default, the thermostat is not.
There are typically two thermostats so it would be helpful to eliminate one or both as problems. I’ll look elsewhere for more definitive help with the thermostats
Thermostat testing
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