When the sensor becomes blocked with debris the heater will not work properly.
Water heater oxygen sensor.
When that happens the easiest fix.
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True enough and enerco also equips their heaters with an oxygen sensor that shuts down the heater if the surrounding oxygen levels dip below a safe threshold.
At a minimum check the following in all cases.
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Oxygen depletion sensor activated.
Before replacing the sensor current amperage in the front heated oxygen sensor heater circuit is out of the normal range.
Check for lack of fresh combustion air such as in a tight closet.
Before screwing in a new sensor this simple test will determine whether everything else is in order.
The unit was not able to resolve an imperfect combustion issue.
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The rheem manufacturing company produces a line of water heaters air conditioners and furnaces for both homes and businesses.
As vehicles grow older there comes a point when the oxygen or air fuel ratio sensor s heater circuit will probably fail.
A flame sensor detects heat coming from the burners.
Oxygen sensor heaters do fail.
This is a safety mechanism.
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Repair your water heater sensor thermistor for less.
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One might think this is to see to it that there s plenty of oxygen for both the heater and the occupants of any construct in which the heater is used.
But there are other possible causes for a heater dtc.
Engine codes water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow.
An retrieve doc.