Howdy Afourians,
My problem began a couple of weeks ago. I have FWC and about 4 months back I removed the t-stat and installed a moyer bypass valve. That brought my temp down about 20 degrees to 150-160 range and things were great. But in the last few weeks she would occasionally start running up into the 200+ range. But then about half the time, it runs up to 160-180 and remains there. BTW i have checked the temp gauge with an IR thermometer (great gadget) and it's pretty accurate.
The raw water side seems to be fine - impeller - flow output - batching - filter - all working as they should.
So, I just replaced the FWC impeller - it was due anyway but there were no vanes missing - in other words - no smoking gun there, darn. The heat exchanger might be the issue but i did a remove and clean about 2 years ago on it. I can feel the cool side where the raw water comes in but as i feel down lower on the exchanger it gets warm about 3/4 of the way up - see pic. Does that sound normal? I am guessing that removal and cleaning it is my next move. But the fact that sometimes it runs at a normal temp is puzzling.
Also - i use green prestone 50/50 diluted antifreeze - this was what the PO used.
I have played with the bypass valve but it does not seem to have much effect - i usually leave it at 45 degrees.
Any thoughts on a miracle cure would really be welcome! Hahaha, OK maybe a miracle cure is asking a bit much. Any thoughts on my next moves?
Sincerely,
Joe
C&C 30 MK1 "Zia"
My problem began a couple of weeks ago. I have FWC and about 4 months back I removed the t-stat and installed a moyer bypass valve. That brought my temp down about 20 degrees to 150-160 range and things were great. But in the last few weeks she would occasionally start running up into the 200+ range. But then about half the time, it runs up to 160-180 and remains there. BTW i have checked the temp gauge with an IR thermometer (great gadget) and it's pretty accurate.
The raw water side seems to be fine - impeller - flow output - batching - filter - all working as they should.
So, I just replaced the FWC impeller - it was due anyway but there were no vanes missing - in other words - no smoking gun there, darn. The heat exchanger might be the issue but i did a remove and clean about 2 years ago on it. I can feel the cool side where the raw water comes in but as i feel down lower on the exchanger it gets warm about 3/4 of the way up - see pic. Does that sound normal? I am guessing that removal and cleaning it is my next move. But the fact that sometimes it runs at a normal temp is puzzling.
Also - i use green prestone 50/50 diluted antifreeze - this was what the PO used.
I have played with the bypass valve but it does not seem to have much effect - i usually leave it at 45 degrees.
Any thoughts on a miracle cure would really be welcome! Hahaha, OK maybe a miracle cure is asking a bit much. Any thoughts on my next moves?
Sincerely,
Joe
C&C 30 MK1 "Zia"
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