Pros, Join Our TradeMaster Program!
IQ LWCO Option Cards add a low water cut-off function to ES2, ESC, Series 3, and MPO-IQ Boilers. LWCO Option Cards plug into the IQ Option Panel and connect to the system-mounted sensor with a single-wire connection. IQ LWCO Option Cards feature built-in diagnostics, probe signal strength display, and include a 'Test' and 'Reset' feature in compliance with UL 353 and CSA 22.2 for CSD-1 Compliance in US and Canada.

Kit Includes:
  • IQ LWCO Option Card
  • 3/4" NPT level sensor
  • 36" wire sensor connector
  • Instructions

Major Features:
  • UL 353 approved
  • Displays signal strength
  • Warns when probe cleaning required
Read more
Manuals (1)
Auto Reset
Used With:
ES2 Series
ESC Steam Boiler Series
Series 3 Boilers
MPO-IQ Boilers
Speak with a real person who will go out of their way to help!
Closed Now: Phone Hours
Monday – Thursday
8am–7:45pm ET
9am–7:45pm ET

This item is compatible with the following Burnham model numbers.

Type the model number of your unit:

or check the list below of compatible model number for this part.

Click on any model number to view complete parts list

warning icon  There are no compatible model numbers that match your entry.

Load More

Please note: Many replacement parts have subtle differences between them and can be easily confused. Attempting to install the incorrect part voids the return coverage. If you are not completely sure your order is correct please give us a call at 1-888-757-4774.

Need help finding a replacement part?

Fill out the part request form and someone will get back to you shortly.

Part request form

Product Reviews

Product Q&A

Add-on Item

This item is cost-prohibitive to ship on its own but is available to ship with orders over $200.

Why don't we show the price of this item?

We try to always offer you the lowest prices possible, but some manufacturers require that we only show these low prices once you take further action.

To see the price, simply add the item to your cart or sign in.