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4520-2030-000
4520-2030-000
4520-2030-000
Marley, Qmark, BerkoGenuine OEM Part

Marley Thermal Cutout Fuse 4520-2030-000 Qmark, Berko Parts

Marley 4520-2030-000 one-time thermal cutoff fuse rated 144°C for Marley and Qmark electric heaters.

$19.00

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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
  • 90-Day ReturnsSee return policy
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SKU: Y4520-2030-000 Categories: , ,

Compatible Models

The Marley 4520-2030-000 fits 112 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 Number4520-2030-000
BrandMarley, Qmark, Berko
Part TypeFuse
Manufacturer DescriptionTHERMAL CUTOUT FUSE WILL NOT REPLACE OLD WITH
ConditionNew — Genuine OEM
Trip Temperature144°C (291°F)
Reset TypeOne-time (non-resettable)
Cross-ReferenceTherm-O-Disc MicroTemp G4AP0205
ListingUL Listed
Compatible Models112 (see list)
AvailabilityIn stock
ShipsSame business day if ordered by 4 PM Central
Returns90 days on new, unused items
SKUY4520-2030-000
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 4520-2030-000

The 4520-2030-000 is a one-time thermal cutoff fuse from Marley Engineered Products. It sits in line with the heater's heating circuit and opens permanently if the temperature reaches 144°C (about 291°F), cutting power to protect the heater from overheating. Unlike an automatic-reset limit, it does not reset after it cools and must be replaced once it trips.

A heater that suddenly goes completely dead may have an open thermal fuse. Find out why it overheated, for example a blocked airflow path or a failed fan, before putting the heater back in service.

Confirm your model number against the compatible-models list on this page before ordering.

Installation Tips

Turn off power at the breaker and let the heater cool. Test the old fuse for continuity to confirm it is open, then install the new one in the same location and connect it the same way. Never bypass the fuse, even temporarily, and correct whatever caused the overheating before restoring 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

Can the 4520-2030-000 thermal fuse be reset after it trips?

No. It is a one-time fuse that opens permanently. Once it trips, it has to be replaced.

Will the Marley 4520-2030-000 fit my heater?

It fits the 112 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 4520-2030-000 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.