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Low hot water pressure with LAARS Endurance
I have a LAARS Endurance combo heat and hot water system. It was installed about 8 years ago. In January the hot water pressure slowed to a trickle making showering an impossibly (The low flow was still maintaining the right temperature). I called the only LAARS certified tech in my area and he came out and diagnosed the problem. He replaced the heat exchanger which he said was clogged, and also replaced the flow valve from an internal metal unit to an external plastic unit. Hot water pressure was back better than before.
45 days later my hot water pressure is dropping drastically again. Can anyone offer any suggestions? It cannot surely be the same problem already?