The surge protector light is off: is the house still protected?

A dark light does not tell you when protection changed

A Reddit homeowner noticed that indicator lights on an older whole-house surge protector were out after a storm and asked whether replacement was worthwhile. The important first distinction is between the home's electricity remaining on and the protective device remaining functional. A house can continue operating while some surge protection is unavailable, depending on the device design.

Source: Is a whole house surge protector like this worth it? I had it installed 9 years ago but now both lights are out after a recent lightning storm. What's a reasonable mid-west price to replace it?

Read the indicator instructions for the actual model

Eaton describes surge devices and their protective components, but indicator meanings and replacement procedures are model-specific. A light may indicate power, a protection mode, a fault, or a condition defined in the manual. Do not assume every dark indicator means a recent lightning strike, or that a green indicator proves the entire installation is correct. Use the exact model's instructions and a qualified assessment where required.

Source: Surge protection FAQ | Eaton · Is my surge protector correctly installed?

A storm is a date, not proof of the failure cause

Illustrative scenario: an owner checks a device for the first time in several years after nearby thunder. The light is dark, but there is no record of when it changed. The storm may be relevant, but the device could have lost protection earlier or have another issue. The useful next action is to identify the model, document the indication, and contact the installer or manufacturer through the specified process, not to conclude that all household equipment was definitely saved or definitely damaged.

Make status visible without opening equipment

Keep a photograph of the accessible label and normal indicator state with the installation records. Ask at handoff what each indicator means, how often the manufacturer recommends checking it, and what action is required if it changes. Some devices or systems offer remote indication; others rely on visible checks. Choose an arrangement that the owner can realistically monitor without opening electrical equipment or entering an unsafe location.

Price replacement separately from other repairs

If replacement is indicated, have the electrician confirm the device's compatibility, installation condition, and any evidence of broader damage. Replacing only the protective module may be appropriate for one product and not another. The estimate should distinguish the device itself, labor, any required corrections, and disposal. A device warranty does not automatically cover a service call or all damaged appliances.

Record the new device and its normal indication

Record the replacement date, model, receipt, and commissioning indication. After a significant electrical event, follow the manufacturer's inspection guidance and have damaged equipment evaluated as needed. Do not repeatedly reset a tripped breaker, including one supplying the SPD; report the trip to the electrician. Do not assume a new surge protector resolves every consequence of the event. Protection status is a maintenance item that should remain visible throughout ownership, not a one-time purchase remembered only after a storm.

Source: Eaton: CHSPT2ULTRA product and technical resources

A separate SPD breaker can be part of the investigation

Eaton’s January 2015 CHSPT2 bulletin is a model-specific example: its status indication depends on the supply being present and the protection elements being intact. The bulletin also addresses the dedicated two-pole supply breaker and says to replace the CHSP unit if that breaker trips. That is a reason for an electrician to investigate the actual device and supply, not for the owner to repeatedly reset a breaker.

For a dark indicator, the service request should therefore include the model, observed indicator state and any known interruption to the device’s supply. The electrician follows the current applicable instructions to distinguish loss of supply from failed protection. A lit house does not prove the SPD’s dedicated supply is on, and restoring supply does not validate a damaged protective element.

Source: Eaton: CHSPT2ULTRA product and technical resources

Put it into practice

A decision table to keep handy