Question about Bosch 2700ES Natural Gas AquaStar AquaStar 2700ES Tankless Water Heat
I have 2 units. one works fine and the other keeps going out. I have vacummed and cleaned the interior, raised the length of the exhaust pipe and relight the unit 5 times with varying legnths of time it would work. Sometimes two days and sometime 4 weeks. I have a second unit, a fire place and stove top further down the gas line that work flawlessly. Any suggestions or service outlet in the Baton Rouge, La. area?
Actually, this comment if coming from the math building at LSU!!!! How nice.
Any ways......You probably have a faulty thermo couple. It is the easiest and cheapest thing to do so try that. Most units have reverse threads so keep that in mind when removing. It is identified by a copper wire that leads to the main control unit. It should also be held in-place by some clips that just pinch the copper in place. Replacing the new one will be just the reverse of the removal.
Hope this helps
Posted on Apr 16, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
Outlet temperature sensor fault
(Temperature below freezing or
1. Check red wire connections at hot water temperature sensor.
Clean terminals with an eraser. If badly corroded, replace sensor
and wire harness. See Fig. 65, page 48.
2. Sensor may trip if water temperature drops below freezing to
protect heater from freezing conditions. Any damage due to
freezing conditions is not covered under warranty.
3. Clean inlet filter screen and clear any debris out of shower
heads, faucet aerators and whole house filters.
4. In areas where water has a high mineral content, periodic
descaling may be necessary.
I would be very surprised if your water temp is below freezing, even in Alaska, check it with a thermometer. Well water is usually around 45 degrees F.
Let me know,
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