Seeking advice on issue with hot water recirculation system

[djwbd92]

Circling back for any future readers of this thread. The root cause looks to have been a bad mixing valve in one of our showers. Now that it has been replaced, the problem appears to have disappeared (fingers crossed).

 

[Twowaxhack]

Circling back for any future readers of this thread. The root cause looks to have been a bad mixing valve in one of our showers. Now that it has been replaced, the problem appears to have disappeared (fingers crossed).

cross connection just as we thought.