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Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 21359
Experience:  40+ yrs. experience as a licensed oil & gas technician.
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I have a Rheem Tankless water heater that doesn't heat the

Customer Question

I have a Rheem Tankless water heater that doesn't heat the water. The blower comes on for only maybe 10 seconds, and I feel hot air coming out, but then it turns cold and in a few seconds, shuts off...
Can you give me a clue?
Submitted: 1 year ago.
Category: HVAC
Expert:  Rick replied 1 year ago.

What are you getting for an error code?

Customer: replied 1 year ago.
I can't see the panel to see any error codes, a wall was built over it. Do I need to get into that wall? Or is there another way to diagnos?
Expert:  Rick replied 1 year ago.

You need access to the display.

Customer: replied 1 year ago.
error code 34
Expert:  Rick replied 1 year ago.

This error can be due to restrictions to air flow around the unit. Could be that wall that's so close you couldn't read the display. Un plug the unit then plug it back in and try again but I suspect you may need to take down that wall if you haven't already