no hot water at faucet

[Ghana]

My daughter has an Apollo water system. No hot water in the winter at the faucets. I turned the mixing valve, no change. We have turned the water tank temp up, but no change. When I close off the heat exchanger valve, then we get hot water at faucets. What is the problem?

My daughter has a plumber coming in Friday to look at it, but she can't afford it. I am trying to fix on my own before the plumber gets here.

[Terence McCann]

Mr. K should be along at any time now.

[Jim Katen]

My daughter has an Apollo water system. No hot water in the winter at the faucets. I turned the mixing valve, no change. We have turned the water tank temp up, but no change. When I close off the heat exchanger valve, then we get hot water at faucets. What is the problem?

My daughter has a plumber coming in Friday to look at it, but she can't afford it. I am trying to fix on my own before the plumber gets here.

Please explain: When you say "no hot water at the faucet" do you mean that water comes out, but is not hot, or do you mean that nothing comes out?

- Jim Katen, Oregon