John Wood 4040SN-PDV User Manual (English)

Questions and Answers:

J
jennifer51Aug 18, 2025
Why John Wood 4040SN-PDV blower will not start?
- D
  diazkimAug 18, 2025
  The blower might not start due to several reasons. First, ensure the unit is receiving power by checking the power cord, fuses, and supply voltage. Then, make sure the thermostat setting isn't too low; increase the temperature setting if needed. A defective air pressure switch (it must be open at start-up) could also be the cause, in which case you should replace it. Other potential issues include a defective blower (replace the blower), disconnected or loose wiring (repair or reconnect the wires), or a control lockout (reset the control and determine the cause of the lockout).
M
melissa91Aug 25, 2025
What to do if hot surface igniter is not glowing on John Wood 4040SN-PDV Water Heater?
- D
  Darlene NelsonAug 25, 2025
  If the hot surface igniter isn't glowing after the warm-up, the 120VAC polarity might be reversed at the outlet. Reverse the polarity at the 120VAC outlet receptacle. Also, the hot surface igniter could be defective, so replace it and check for 120VAC across I1 & I2 (Robertshaw only). Finally, the control itself might be defective, requiring replacement.
T
Taylor StanleySep 3, 2025
How to fix a John Wood Water Heater blower that will not start?
- J
  jvaughnSep 4, 2025
  If the blower on your John Wood Water Heater isn't starting, here are a few things to check: First, make sure the power cord is plugged in and check the fuses and supply voltage. You might also want to increase the thermostat temperature setting. If those aren't the problem, consider replacing the air pressure switch or the blower itself. Also, check for any damaged or disconnected wires and repair or reconnect them. Finally, try resetting the system, but be sure to determine the cause of the lockout first.
D
davissarahSep 7, 2025
What to do if the hot surface igniter is not glowing on my John Wood 4040SN-PDV Water Heater?
- C
  Christian DuncanSep 7, 2025
  If the hot surface igniter on your John Wood Water Heater isn't glowing after the warm-up period, the 120VAC polarity might be reversed at the outlet. Try reversing the polarity at the 120VAC outlet receptacle. If that doesn't work, consider replacing the igniter, ensuring you check for 120VAC across I1 & I2 (Robertshaw models only). As a last resort, you may need to replace the control.
L
Leslie PerezSep 12, 2025
Why is the control locked-out with a solid green LED on my John Wood 4040SN-PDV Water Heater?
- W
  wadamsSep 12, 2025
  If the control on your John Wood Water Heater is locked out and shows a solid green LED, the suggested solution is to replace the control. This could also be due to ECO failure from excessive water temperature, in which case you should replace the control. Another possibility is excessive humidity or a damp environment; in this case, allow the control to dry.