Rheem Question

Tony Pullen

I recently switched over from installing one brand and am now installing Rheem units. Needed a new unit myself, so I installed one on my own home, so I could give an educated opinion of the unit. Everyone elses is operating correctly....BUT...mine isn't! When the unit goes into defrost (HP) it will initiate the cycle, and come out, but won't restart the unit in heat mode. There is a rapid "clicking" noise in the unit, which I believe is coming from the RV. The relay on the board is also simultaneously "clicking". I use emergency heat to satisfy the stat and on the next call for heat, the unit starts normaly and works fine....until defrost time!!!! Then the entire sequence is repeated.... Bad Board?

Vaporx

Rheem is what I install...mostly RPNL models: demand defrost board with LED diagnostics. Haven't seen that issue before. You're saying the contactor is dropping out? Some boards will de-energize the contactor at the end of the defrost cycle, but I honestly don't know if the Rheem boards do that.

The "clicking" is suspicious, but you should eliminate a high pressure trip before condemning the board...or at least, I would.

Tony Pullen

Had my supplier to order a new board, and volia its fixed! think the board was initiating defrost and was only getting as far as the rv. It appears it was cycling the rv very rapidly, for whatever reason. (I personaly think that the board was trying to terminate the cycle but since the timer had not been satisfied, it would imediatly try to re-initiate it and would not terminate the defrost cycle, nor would it lock out)....sooooo...go figure!

Vaporx

A bad board would have been my best guess...but electronic stuff makes me paranoid.