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.

furnace and water pump are not coordinated

Options
positano
positano Member Posts: 3
in Gas Heating
The problem is a Weil-McLain furnace (EG) with a Taco SR501 1 zone switching relay. When the furnace responds to the thermostat and goes on, the water pump does not and the Taco relay does not turn red. Does the relay need replacement ?

Comments

  • DZoro
    DZoro Member Posts: 1,048
    Options
    Is that the only zone you have?
  • positano
    positano Member Posts: 3
    Options
    Yes
  • HVACNUT
    HVACNUT Member Posts: 5,833
    edited December 2017
    Options
    Is the green light on?
    If yes, try jumping RW in the 501.
    If the green light is not on, there's no power to it.
    Why is there a seperate switching relay for 1 zone?
    positano
  • positano
    positano Member Posts: 3
    Options
    The green light is on.
    I will try jumping RW.
    I do not know why it is built this way.
  • HVACNUT
    HVACNUT Member Posts: 5,833
    Options
    Is the circ. hot connected to terminal 4 N.O. on the 501? If you have a meter. Check 2 to 4 in the 501 with a heat demand. 115v.? Should be jumper between 1 and 3.
    Can you post a pic of the 501 with cover off from 2 feet away?

Categories