It appears the SR405 on my heating system has blown it's Fuse(s).
No power light, no circulation, no heat, fkn cold at 26ºF.
Are there spare fuses within the box .... in theory?
If not, what kind of fuses are they other than 5A? Are they minis or regulars or ...?
If the fuse(s) blow again upon replacement, does that point to the Taco pcb itself or possibly a dead wall stat? Is there any way to check which it might be.
I have a DVM and and reasonably confident around 120v and LV DC circuits.
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