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GV90+ Flowing in Reverse
MDB
Member Posts: 2
I have a Weil-McLain GV90+ that appears to be flowing in reverse. Does anyone know how/why this is happening? I've had numerous techs look at it with no luck.
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Comments
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Make sure both the internal circulators are functioning properly, if one or the other has died it can cause some funky flow patterns. Why do you think it is flowing in reverse?0
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When the boiler fires and starts circulating the return side is too hot to touch and the supply side starts cool and slowly begins to heat up. It never reaches 100 degrees according to the gauge.
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I agree with delta T, there are two pumps internally, one is for keeping the boiler internally at temp and flowing one sends it out to the system based on water temp. You could post pics and that may help us determine whats wrong, if its not the internal circ.Tom
Montpelier Vt0 -
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agree with Dennis, you need an amp probe or something to really tell if the pumps are running or not. Wasted hours on a GV90 one time because of this. Sounds like you have an internal pump not working for sure. If one is gone, I would replace both as the other is likely close to failure as well.0
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