jwshome
New Member
Hi all, new member here. I recently had two new Solaris evac tube water heaters installed. One is a 15 tube and the other is an 18 tube, both virtually identical except for tank size and number of tubes. The 15 tube produces water temperatures in excess of 170 F on a normal day. However the 18 tube only reaches 120 F on the same day. I have isolated both systems to ensure I don't have unknown flow but the larger will not exceed 120 F.
I have removed the tubes and reinstalled, ensuring the bulbs are seated in the tank manifold. I do NOT have thermal paste on the bulb ends for either water heater. When I removed the tubes while in full sun, the bulb ends are hot enough to boil water, although I have not taken actual temperature measurements, so I don't suspect I have bad tubes. But for the life of me, I can't understand why the 18 tube does not produce hot enough water, being installed in the identical environment as the 15 tube. Could something be wrong inside of the tank itself? Help !
I have removed the tubes and reinstalled, ensuring the bulbs are seated in the tank manifold. I do NOT have thermal paste on the bulb ends for either water heater. When I removed the tubes while in full sun, the bulb ends are hot enough to boil water, although I have not taken actual temperature measurements, so I don't suspect I have bad tubes. But for the life of me, I can't understand why the 18 tube does not produce hot enough water, being installed in the identical environment as the 15 tube. Could something be wrong inside of the tank itself? Help !
