A Rinnai 105000299 Hi Limit Switch cuts power when temperatures rise too high to protect internal components from excessive heat.
The hi limit switch monitors temperature conditions and interrupts operation when the heating and cooling equipment exceeds a safe limit, protecting internal components from overheating. Its calibrated design matters because it must respond accurately and consistently under high-heat conditions to maintain safe performance within the HVAC system.
The hi limit switch may need replacement if the heating and cooling unit shuts down unexpectedly, cycles erratically or fails to maintain normal operation due to improper temperature sensing. Common indicators include visible wear, heat damage, corrosion or wiring issues and you might notice problems after prolonged exposure to excessive heat, moisture or other harsh operating conditions.
Parts Town provides same-day shipping on in-stock real OEM HVAC replacement parts Monday—Friday until 9 PM ET, as well as on Saturday until 4 PM ET for online air orders. We work hard to make shipping as quick and reliable as possible on every order. You can check the delivery status of your real OEM heating and cooling parts by heading to our Track My Order page and typing in your order number or purchase order (PO) number and zip code. By making it easy to stay informed, you'll have peace of mind that your order is on its way. Of course! Customer assistance for your real OEM HVAC parts is available 8 AM to 9 PM ET Monday—Friday through chat, email, phone and more. Check our Contact Us page to learn how to reach a team member with any questions you might have. Of course! We provide the option to return most new, unopened real OEM heating and cooling replacement parts within 90 days of delivery, so go to our Returns page and see if your order qualifies. Certain items, including custom orders, may not be eligible for return.Read More FAQs
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