Erv duct condensation
Find out why ERV ductwork is sweating or dripping. Check insulation, airflow, drain issues, and setup problems before replacing ERV parts.
HVAC • RepairRiot
HRV / ERV Troubleshooting & Repair Guides
Start with fan operation, stale-air symptoms, filters, condensate, controls, and outdoor intake clues before replacing parts.
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Featured hrv / erv guides
Erv not reducing humidity
If your ERV is running but indoor humidity stays high, start with filters, airflow, settings, and outside-air conditions before blaming the unit itself.
Erv stale air upstairs
If the upstairs feels stale even with the ERV running, start with airflow checks, filters, grilles, and mode settings before assuming the unit has failed.
Hrv erv dripping water
Find out why an HRV or ERV is dripping water. Start with the drain, filters, and frost clues, then decide whether you can fix it safely or need service.
Hrv erv keeps shutting off
If your HRV or ERV keeps shutting off, start with power, wall control settings, filters, and drain or frost clues before assuming a bad motor or board.
Hrv erv not exhausting air
Troubleshoot an HRV or ERV that is not exhausting air. Start with power, settings, filters, and outside hoods before assuming a bad motor or control problem.
More hrv / erv problems
Hrv / erv not working
Troubleshoot an HRV or ERV that is not working by checking power, controls, filters, airflow, and frost or drain issues before considering parts.
Hrv erv smells bad
Track down bad smells from an HRV or ERV by checking filters, drain issues, stale water, outside intake problems, and dirty cores before replacing parts.
Hrv erv vibrating
Find out why an HRV or ERV is vibrating by checking mounting, filters, core fit, ice, and blower balance before assuming a motor failure.
Hrv condensation drips
Find out why your HRV is dripping condensation. Start with drain, filter, and airflow checks, then separate unit sweating from duct condensation and know when to call for service.
Hrv condensation inside unit
Find out why an HRV or ERV is collecting condensation inside the cabinet. Check filters, drain path, airflow, and frost clues before replacing anything.
Hrv core frosting up
If your HRV core is frosting up, start with filters, airflow, drain condition, and defrost operation before blaming the core. Here’s how to sort out the likely cause safely.
Hrv duct sweating
Find out why HRV ductwork is sweating, dripping, or frosting. Start with airflow, insulation, and drain checks before assuming the HRV itself has failed.
Hrv erv condensation leaking
Find out why an HRV or ERV is leaking condensation, starting with the drain line, trap, filters, and airflow before assuming a major internal failure.
Hrv erv core frozen
If your HRV or ERV core is frozen, start with airflow, filters, drain, and defrost checks before blaming the core. Here’s how to tell what’s actually wrong and when to stop DIY.
Hrv erv defrost problem
Troubleshoot an HRV or ERV defrost problem by checking frost pattern, filters, drains, outdoor hoods, and controls before replacing parts or calling for service.
Hrv erv exhaust fan not working
If your HRV or ERV exhaust fan is not working, start with power, controls, filters, and airflow checks before assuming the fan motor failed. Here’s how to narrow it down safely.
Hrv erv low airflow
Low airflow from an HRV or ERV is usually caused by dirty filters, blocked exterior hoods, a loaded core, or a fan problem. Start with safe airflow checks before chasing parts.
Hrv erv supply fan not working
Troubleshoot an HRV or ERV supply fan that is not working. Start with power, settings, filters, and airflow checks, then decide when the fan motor or controls need service.
Hrv fan noisy
Track down an HRV or ERV fan noise by checking filters, covers, mounting, ice or debris, and blower wheel condition before assuming the motor is bad.
Hrv fan stops in cold weather
If your HRV fan stops in cold weather, start with frost, filters, drain issues, and defrost behavior before blaming the motor. Here’s how to sort out normal cold-weather cycling from a real shutdown.
Hrv freezes in winter
If your HRV freezes in winter, start with filters, drain path, outdoor hoods, and airflow balance. Find out when frost is normal, when it is not, and when to call for service.
Hrv ice in drain line
Find out why an HRV drain line is freezing, starting with airflow, drain slope, and trap issues before you assume a major part failed.
Hrv making noise
Find out why your HRV or ERV is making noise by separating normal airflow sounds from rattling, humming, vibration, and fan problems. Start with safe checks first.
