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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 8298
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have no hot water and Er3 is showing on panel

Customer Question

I have no hot water and Er3 is showing on panel
Submitted: 1 year ago.
Category: HVAC
Expert:  Phil replied 1 year ago.


This should be the manual for your water heater.

Er3 means the unit is slow heating up the water, that can be because of a problem with the water heater, or built up calcium deposits on the heat exchanger or simply because it it is under heavy use.

Tell me about the hot water usage today, and about how old the water heater is. We can go from there without a time limit.


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