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Wanted: electrician to check today, stove use which is tripping my apartment's electricity off

Hello - I have recently purchased my first apartment and have moved tenants in. The apartment is in the Aura Building, 53 Cook Street, Auckland Central. My tenants have advised me that when they switch the stove on, this trips the electricity of the whole apartment off. The stove and electricity was working all ok for about a week before this happened. What do you think could be wrong and would you be able to look at this and resolve today?