Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

US Boiler ES2 Error 32

Hans64 Member Posts: 1
Found in the manual that Error 32 is a “Temperature sensor or interface failure (open or short connection, increased connection resistance, dual sensor mismatch) or control hardware failure“.
That’s quite a range of possibilities. Any ideas what this usually is? How do I please troubleshoot this?
I would appreciate any insights. The system is running, but doesn’t reach set point temperature.
Thank you


  • Boon
    Boon Member Posts: 260
    Did you do the next steps in the manual?

    - Check sensor is securely attached to control P7 connector.
    - Check sensor wire is not damaged.
    - If secure and in good condition, replace sensor.
    - If problem persists, replace control.
    DIY'er ... ripped out a perfectly good forced-air furnace and replaced it with hot water & radiators.