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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a new rheem gas tankless water heater (new

Customer Question

I have a new rheem gas tankless water heater (new construction) it doesn't seem to be working
JA: How long has this been going on? And how severe is the problem?
Customer: It's a brand new unit and it has never worked
JA: Do you plan on doing the work yourself?
Customer: It's been installed by professionals, water is on as is the gas also electricity seems to be on because the remote is on
JA: Anything else we should know to help you best?
Customer: I have the remote set to 140 as per the instructions
Submitted: 8 months ago.
Category: HVAC
Expert:  gotoman for ac replied 8 months ago.

Russ here. Check make sue you have power to unit. Make sure gas is on. Check panel on unit for a fault code. If you do have power to unit. Turn off and back on reset faults. Let me know after you do checks. Russ