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4520-2027-000
4520-2027-000
4520-2027-000
Marley, Qmark, BerkoGenuine OEM Part

Marley Manual Reset Limit 4520-2027-000 Qmark, Berko Parts

150°F manual reset high limit for Marley, Qmark and Berko large electric wall heaters.

$32.90

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if ordered in the next

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  • Genuine OEMFactory original part
  • Same-Day ShippingIn-stock orders by 4 PM Central
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SKU: Y4520-2027-000 Categories: , ,

Compatible Models

The Marley 4520-2027-000 fits 349 models. Type your model number to check.

Don’t see your model? This list may not include every model this part fits. Call 800-654-3545 or email [email protected] and we’ll check compatibility for you.

Need help finding your model number?

Product Details

Part Number4520-2027-000
BrandMarley, Qmark, Berko
Part TypeLimit
Manufacturer DescriptionMANUAL RESET L150F
ConditionNew — Genuine OEM
Trip Temperature150°F (opens on rise)
Reset TypeManual
Switch TypeSPST
Control TypeBimetal disc (60TX15, L150F)
Compatible Models349 (see list)
AvailabilityIn stock
ShipsSame business day if ordered by 4 PM Central
Returns90 days on new, unused items
SKUY4520-2027-000
Not sure this is the right part?Our parts experts will check it against your model number.800-654-3545 · [email protected]Mon–Fri, 8 AM–5 PM Central

About the Marley 4520-2027-000

The 4520-2027-000 is a manual reset high limit for Marley wall heaters. It works as an overheat safety: if the temperature inside the heater reaches about 150°F, the limit opens and cuts power. It stays open until someone presses its reset button, so the heater cannot restart on its own after an overheat.

It is sold as a high limit for large Marley wall heaters.

A limit that trips repeatedly is often a sign of another problem, such as a blocked grille or a failing fan motor, so find the cause before replacing it. Replace the limit itself if it will not reset or no longer holds. Check your model number against the compatible-models list on this page.

Installation Tips

Turn off power at the breaker and let the heater cool. Label the wires on the old limit, remove it from its mounting, and fit the new one in the same position so the sensing surface reads the same spot. Reconnect the wires, make sure the reset button can still be reached, and restore power.

Why Buy From Carroll Parts?

  • Helping Fix Things Since 1938Over 85 years of parts expertise
  • Same-Day ShippingIn-stock orders placed by 4 PM Central ship the same business day
  • 90-Day Return PolicyBuy with confidence
  • Real Parts Experts800-654-3545 · Mon–Fri, 8 AM–5 PM Central

Frequently Asked Questions

Why does my heater stay off after the 4520-2027-000 limit trips?

It is a manual reset limit. Once it opens it stays open until the reset button is pressed, even after the heater cools. Find out why it overheated first, for example a blocked grille or a fan that is not running.

Will the Marley 4520-2027-000 fit my heater?

It fits the 349 models listed under Compatible Models on this page. If your model isn’t listed, call us at 800-654-3545 and we’ll check for you.

Is the Marley 4520-2027-000 a genuine OEM part?

Yes. This is a genuine Marley factory replacement part, not an aftermarket copy.

When will my order ship?

In-stock orders placed by 4 PM Central ship the same business day.

What is your return policy?

Items must be new and unused. You can return them within 90 days. Please read our return policy before sending anything back. Questions about a return? Call 800-654-3545 or email [email protected], Mon–Fri, 8 AM–5 PM Central.

Related Parts

Other parts used in some of the same Marley, Qmark, Berko heaters. Check that your model is listed on each part’s page before ordering.