Fridge & Thermostat suddenly not working
I just drove my 1984 Rockwood RV from Massachusetts to California with very few problems. The thermostat and fridge worked great the entire time. The aux battery needed to be recharged a few times to ...
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It at least was (we had a 1984 Coach) common to have the converter power 12-volt things like lights and fans, while the fridge's logic board was always powered by the battery. If the battery was not being recharged, the fridge would shut down. That happens to us, because the charger part of the converter (correctly called Converter/Charger) had failed.
If in your case the logic boards for both fridge and furnace were wired to always be battery powered, the coach/house battery going low would keep those two appliances from working.
As noted, a Digital Volt Ohm Meter (DVOM) is essential. Those cheap/free Harbor Fright ones are excellent to carry along. I try to have one at home, in the RV, in the boat, and in each vehicle. Shop at all at HF and you'll have a box of them on hand before long.
OH, Why Direct to Battery? Because the converter made a "dirty" or "noisy" 12VDC. Plenty good for light bulbs and brush-style motors but possibly interfering or damaging to solid state circuits. A battery is an excellent "filter" so having it in circuit kept things cleaner electricity-wise.
If in your case the logic boards for both fridge and furnace were wired to always be battery powered, the coach/house battery going low would keep those two appliances from working.
As noted, a Digital Volt Ohm Meter (DVOM) is essential. Those cheap/free Harbor Fright ones are excellent to carry along. I try to have one at home, in the RV, in the boat, and in each vehicle. Shop at all at HF and you'll have a box of them on hand before long.
OH, Why Direct to Battery? Because the converter made a "dirty" or "noisy" 12VDC. Plenty good for light bulbs and brush-style motors but possibly interfering or damaging to solid state circuits. A battery is an excellent "filter" so having it in circuit kept things cleaner electricity-wise.
