I tried resetting the water heater by turning it off for 10 minutes, then turning it back on. No change. I removed the fuse as another method of resetting. Same.
I called our dealer, and Service told me that they had not heard of such an occurrence. I called Girard Products and spoke to a tankless water heater technician. He said that there is no programming reset for the Girard tankless water heaters (I was hoping for one of those “Press and hold both the up and down arrows for 6 seconds. When the display starts to flash, …). He offered two possible culprits:
1. Low water flow - he said low flow can cause the heater to be erratic.
2. Warm water entering system- if the water is warm when it enters the heater, inaccurate readings are possible.
I believe we may have both conditions. The pressure of the water coming out of the spigot is probably below normal, and the extreme heat here may play a role as well. We tried turning the pump on, which does indeed boost the pressure coming out of our faucets and shower head, but that did not fix the problem. What is interesting, though, is that when we add the pump to the equation, the temperature still soars to 107 to 109, but then stays there (when set to 102 degrees). I guess we won’t know for sure until we get home a week from now.
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