Heatilator Eco Choice Red Thermister Exhaust Sensing Probe (ESP), 3-20-00844-AMP


A $80.00 Savings vs the OEM

SKU 3-20-00844 (HEA) AMP
MPN 3-20-00844
In Stock
  • Aftermarket Part
  • Extremely Durable
  • High Temp Limit 527°F | 275°C
  • Ships FREE with orders over $199
  • 30-Day Hassle Free Returns!
  • 90 Day Warranty Included
  • Buy with confidence-Buy with the experts!
  • See Complete Description
Notify Me When Available


This version of the ESP is the correct part for any model made after 2008. This updated ESP has red wires, as opposed to the previous probes which could have had black, yellow, or white wires. New Circuit boards are now sensing the condition of the differential pressure switch. (FIG 4) 

Notes for ordering replacement parts:

  • If you need a new probe: Order to match your existing probe. Red= #3-20-00844
  • Black, White, or Yellow Probe: Order the black Probe.
  • If you need a new board: Order using the part numbers included here.
  • If installing on a unit with an old probe = Dipswitch #5 “OFF”.
  • With new probe= Dipswitch #5 “ON”.
  • The DVC500 uses two probes, ESP and TCP(temperature control probe). They must be of the same color

    Replacement For Part Number:
    • 3-20-00844

    Click To See Compatible Models
    UPC:  652174715022

    Technical Specs

    High Temp Limit 527°F | 275°C



    Assembly Instructions For Heatilator Eco Choice Red Thermister Exhaust Sensing Probe (ESP), 3-20-00844-AMP

    You must be careful not to bend an ESP probe if removing it for maintenance purposes. Bending the sheath of the probe will usually ruin the sensor. Likewise, when cleaning your stove, care should be taken to not bend the sensor when cleaning. Do not send brushes or vacuum tools through the stove blindly. Before cleaning your stove for the first time, find the ESP probe and make sure that it is not going to be in the way when cleaning. If it is, remove it from its mount prior to performing work.

    Using a 1/4" socket, remove the mounting screw and remove the thermocouple from the stove. Trace the wires back to the control board and unplug the wires.

    DIP Setting by Stove Model



    Unfortunately, sometimes products do not work like they are supposed to. We offer a 90 day warranty on manufacturer defects. Some manufacturers make this a very simple and easy process unfortunately others do not. Items must be used in accordance with the manufacturers guidelines to qualify for warranty replacement. Please be advised that warranty claims for these parts may take up to 4 weeks for processing, and customers must cover shipping.

    Shipping Info

    This Item Qualifies For Free Shipping With Orders Over $199!

    When Will My Order Ship

    All orders are typically processed within 24 hours of receiving payment and are shipped from us same day if placed before our shipping cutoff time (Monday - Friday: 1PM, Saturday: 10AM, Sunday: No Shipping), orders placed after our cutoff time are shipped the next morning.

    How Does Free Shipping Work?

    Most orders over $199 qualify for free shipping! Orders which ship for free are shipped with either USPS or UPS based on our discretion. If you are using a PO box, free shipping orders will always go USPS.

    Is Expedited Shipping Available?

    We offer both overnight and two day air shipping services for all orders placed within the Continental United States. For information on shipping cut-off times, go to our shipping page.

    Do You Ship To Canada?

    We ship to Canada! We estimate USPS to take 4-10 days once receiving your package from us. We do not offer expedited shipping of any kind to Canada. Please allow an extra 2-5 days for all shipments to Canada. Free shipping is not available to Canada.

    Do You Ship To Alaska Or Hawii?

    We ship to both Alaska and Hawaii! We do not offer next day or two day shipping to Alaska or Hawaii. Free shipping is not available to Alaska or Hawaii.

    Do You Ship Outside The US Or Canada?

    Unfortunately, at this time we do not offer international shipping other than to Canada.

    Shipping Time Estimations

    For information on shipping time estimations, see the Shipping Information & Transit Times on the shipping page.

    Read More About Our Shipping Information

    Customer Reviews

    No reviews yet


    If your question does not concern this specific product, use our contact form

    Have a Question?

    Be the first to ask a question about this.

    Ask a Question

    Customer Reviews

    No reviews yet