A Lochinvar 100208807 Fuse interrupts excess current to protect electrical components within the climate-control setup.
The fuse safeguards the HVAC system by interrupting excessive current while still allowing brief startup surges to pass without nuisance failures. Its time-delay design and 250V, 1.25A rating are important because they match the electrical demands of heating and cooling equipment and support safe, reliable operation of sensitive components.
The fuse may be failing if the heating and cooling unit loses power intermittently, will not start or shuts down when electrical demand increases. Physical signs can include a visibly broken element or discoloration and environmental signs may include repeated failure after power fluctuations, moisture exposure or overheating inside the control compartment.
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