I went back and reread your thread. I missed that statement. I was thinking of the house batteries, now I see it was the chassis battery.
If one boils and the other does not, either one is low on water or the battery is bad. You can take off the covers, but they are not meant too. The battery is most probably not good anyway, so for good measure, take the covers off and check the water level. Just for curiosity. Check the connections on each post to make sure they are clean, tight and good. Maybe, the one boiling was getting a charge and the other one was not getting a good charge due to bad connections, and the charger was getting mixed readings. It is worth a try.
__________________
2003 Pace Arrow 34W, F-53 V-10 22,000#, 5-Star, Avg 7.7 MPG, ScanGauge II, 540 Watt Solar
WiFiRanger Elite Pack, WeBoost 4G-X, Voltage Booster, Progressive Industries EMS
Water Softener, Safe-T-Plus, Koni, Centramatic Balancers, CHF, Rear Trac Bar, EEZ TPMS
|