Why does the heat work but not the fan?

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Royal Heat RS-100

Royal Heat RS-100 variable temperature space heater with fan. 120V, 60 Hz adjustable to 1500 Watts. The space heater can be recognized by its box-like shape with convection panels in the front.

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Mike Gnazzo @mikegnazzo

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Опубликовано: 21 янв 2026 г.

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Why does the heat work but not the fan?

I know that the fan works because I unsoldered it and plugged it into an outlet. Upon reconnecting it, it again did not work... either in HEAT setting or FAN setting. What next to check?

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jayeff @jayeff Репутация: 532,4к 11 405 1,5к · Answer 1 · 2026-01-21T07:24:38-07:00

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jayeff @jayeff

Репутация: 532,4к

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Опубликовано: 21 янв 2026 г.

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Hi @mikegnazzo

Disconnect the power to the unit and then use a DMM's (digital multimeter) Ohmmeter function to check if the Heat/Off/Fan switch is OK when testing directly across the switch terminals when the switch is in the Fan and also the Heat position.

Here's the ifixit Royal Heat RS-100 Power/Fan Switch Replacement guide that will help to gain access to the switch terminals

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Thanks for your help. I tester the switch and it works properly. For my knowledge, when this unit is working perfectly, does the fan turn on immediately when it's in heat mode, or does it have to reach an operating temperature first and THEN cycle on?

6 фев 2026 г. из Mike Gnazzo

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Royal Heat RS-100

Why does the heat work but not the fan?

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