Fuse 1A

The 1A Fuse is a 1-amp fuse in the long (6x32mm) physical format used on Global-built spa motherboards. It protects the transformer that supplies low-voltage power to the topside control panel and most of the spa's signal electronics.

What it means when this fuse blows: The single most common symptom is a topside control panel that's gone completely dark — no display, no buttons responding, no temperature reading. The pumps and heater may continue to run on a stale set point until the next cycle, but you've lost the ability to control or program the spa. The fuse itself blows because of a voltage spike from the incoming line, a failing transformer, or a fault somewhere downstream on the low-voltage circuit.

How to replace it: Always turn off the spa's breaker at the house panel first — never replace a fuse with the spa powered up. Open the equipment access panel, locate the Global motherboard, and find the marked transformer fuse holder. Pull the old fuse out, inspect for the broken filament that confirms it blew, and snap in a fresh 1A long-format fuse. Restore power at the breaker.

When to call for service: If the new fuse blows again within minutes or hours, stop replacing it — there's an underlying short or transformer failure that will keep eating fuses until the root cause is fixed. Book a service call rather than chasing it yourself. If your spa uses a Gecko motherboard instead of Global, you need the 1A Short Fuse instead. Not sure which board you have? Bring the old fuse to any of our three Ontario showrooms.