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Marley Engineered Products
SKU: HPS-MP-4520-2018-003
Marley Engineered Products 4520-2018-003 Limit Switch
$68.99 -
Marley Engineered Products
SKU: HPS-MP-4520-2024-000
Marley Engineered Products 4520-2024-000 Limit Switch
$42.99 -
Marley Engineered Products
SKU: HPS-MP-4520-2028-000
Marley Engineered Products 4520-2028-000 Limit Switch
$64.99 -
Marley Engineered Products
SKU: HPS-MP-4520-2031-000
Marley Engineered Products 4520-2031-000 Limit Switch
$18.99 -
Marley Engineered Products
SKU: HPS-MP-4520-2059-000
Marley Engineered Products 4520-2059-000 Limit Switch
$21.99 -
$61.99
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Marley Engineered Products
SKU: HPS-MP-4520-2017-000
Marley Engineered Products 4520-2017-000 Limit Switch
$148.99 -
$66.99
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$61.99
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Marley Engineered Products
SKU: HPS-MP-4520-2048-000
Marley Engineered Products 4520-2048-000 Limit Switch
$54.99 -
Marley Engineered Products
SKU: HPS-MP-4520-2027-000
Marley Engineered Products 4520-2027-000 Limit Switch
$40.99 -
Marley Engineered Products
SKU: HPS-MP-4520-0011-002
Marley Engineered Products 4520-0011-002 Limit Switch
$125.99 -
Marley Engineered Products
SKU: HPS-MP-4520-0011-000
Marley Engineered Products 4520-0011-000 Limit Switch
$105.99
Safety Devices
(Showing 13 of 13)Shop Marley Engineered Products safety devices used for temperature-limit, tip-over, airflow, and other protective shutdown functions. This category organizes existing OEM replacement parts by service function so buyers can narrow the catalog without relying on broad keyword results. Always order by the exact manufacturer part number whenever possible. Before purchasing, confirm safety function, setpoint or rating, mounting, terminals, and exact OEM number. Similar-looking parts may have different ratings, connectors, revisions, dimensions, or approved equipment applications.
Buyer Guide
Start with the equipment model and serial information, then compare the original label and OEM part number. For safety devices, confirm safety function, setpoint or rating, mounting, terminals, and exact OEM number. If the original number is superseded, confirm the replacement through current manufacturer documentation rather than assuming compatibility from appearance.
Buyer Guide & FAQs
Can a safety device be bypassed during normal operation?
No. Safety devices require proper diagnosis and correct approved replacement; bypassing can create fire, shock, or equipment hazards.
What information should I provide for fitment help?
Provide the equipment manufacturer, complete model and serial information, the original part number, and clear photos of the label and connections. HVACProSales can help identify options, but final diagnosis and installation should be completed by a qualified technician when appropriate.