Boiler displays COND or Condensate Fault; unit may shut down due to blocked condensate.

Safety first: Turn off power before servicing the condensate system. Condensate is mildly acidic; wear gloves and eye protection.

• Locate condensate trap: On Laars condensing boilers, find the clear or opaque plastic trap near the bottom of the unit.
• Clean the trap: Remove the trap per the manual. Flush it with clean water to remove sludge and debris. Reassemble, ensuring all seals are tight.
• Inspect drain line: Follow the tubing to the drain. Remove kinks, ensure proper downward slope, and check that the outlet is not submerged or blocked.
• Protect from freezing: In cold areas, insulate or reroute the condensate line to prevent freezing.

When to call a professional: If the condensate sensor or internal drain passages are blocked, a technician should perform a more thorough cleaning.