Dryer Troubleshooting: Solving Common Problems

When your dryer starts acting up, don't immediately assume the worst. Many common problems have simple solutions that don't require a technician. In my decade of appliance repair, I've seen countless service calls that could have been avoided with basic troubleshooting.

This guide walks through the most frequent dryer issues, their likely causes, and the fixes you can attempt yourself. We'll also cover when it's time to call in professional help.

Problem: Dryer Won't Start

When you press the start button and nothing happens, work through these checks systematically:

Check the Basics

• Power supply: Ensure the dryer is plugged in and the outlet works (test with another appliance)
• Circuit breaker: Check your switchboard for tripped breakers and reset if needed
• Door latch: The door must be completely closed; check for lint or obstructions preventing a proper seal
• Control lock: Some dryers have a child lock or control lock feature that disables the start button

Deeper Checks

• Start button: If the button feels different or unresponsive, it may need replacement
• Door switch: This safety switch prevents operation when the door is open; it can fail over time
• Thermal fuse: A blown thermal fuse (from overheating) will prevent the dryer from starting

When to call a technician: If basic checks don't resolve the issue, the problem likely involves the motor, control board, or internal wiring that requires professional diagnosis.

Problem: Dryer Runs But Doesn't Heat

If your dryer tumbles normally but clothes come out damp, the heating system isn't working properly.

For Electric Dryers

• Check the circuit breaker: Electric dryers use two breakers; if one trips, the drum may spin but the heating element won't work
• Heating element failure: These wear out over time and may need replacement
• Thermal fuse: A blown fuse cuts power to the heating element
• Thermostat issues: Faulty thermostats can prevent the heater from engaging

For Gas Dryers

• Gas supply: Ensure the gas valve is open
• Igniter problems: The igniter glows to light the gas; if it fails, there's no heat
• Gas valve solenoids: These open to allow gas flow and can fail over time

For Heat Pump Dryers

• Dirty filters: Heat pump dryers have multiple filters; clogged filters prevent proper heat circulation
• Condenser cleaning: A dirty condenser reduces efficiency and heating capacity
• Refrigerant issues: Requires professional diagnosis and repair

Problem: Clothes Take Too Long to Dry

This is the most common complaint, and fortunately, it's usually fixable without professional help.

Airflow Issues (Most Likely Cause)

• Clogged lint filter: Clean after every load; wash monthly with soap to remove residue
• Blocked lint trap housing: Lint escapes past the filter and accumulates in the housing
• Restricted exhaust duct: Check for kinks, blockages, or excessive length
• Blocked external vent: Bird nests, lint buildup, or stuck flappers restrict airflow

Load Issues

• Overloading: Clothes need room to tumble; don't fill past two-thirds capacity
• Mixed fabric types: Heavy items mixed with light ones dry unevenly
• Insufficient spin: Clothes too wet from the washer take longer to dry

For Condenser and Heat Pump Dryers

• Full water tank: Many dryers pause when the tank is full
• Dirty condenser: Clean according to manufacturer's schedule
• Poor ventilation: Even ventless dryers need adequate room ventilation

Problem: Dryer is Making Unusual Noises

Different sounds indicate different issues:

Squeaking or Squealing

• Drum belt: A worn or loose belt squeaks as it slips on the drum
• Idler pulley: This keeps tension on the belt; worn pulleys squeak
• Drum glides: Plastic or felt strips that support the drum wear over time

Thumping or Banging

• Items in the load: Check pockets for coins, keys, or other objects
• Unlevel installation: An unlevel dryer rocks during operation
• Worn drum rollers: These support the drum and thump when worn flat

Grinding or Scraping

• Foreign objects: Small items can get caught between the drum and housing
• Worn drum bearings: Creates a grinding noise that worsens over time
• Damaged drum seals: Causes scraping as the drum rotates

Humming Without Tumbling

• Seized motor: The motor tries to start but can't turn
• Broken belt: Motor runs but drum doesn't turn
• Locked drum: Check for items jammed in the drum

Problem: Dryer Stops Mid-Cycle

Overheating Protection

Most dryers have thermal cut-off switches that stop operation if the dryer overheats. This usually indicates an airflow problem:

• Clean all lint filters and check exhaust ducting
• Ensure the dryer has adequate clearance around it
• Allow the dryer to cool completely before attempting to restart

Other Causes

• Full water tank: Condenser dryers stop when the tank needs emptying
• Power fluctuations: Voltage drops can cause the dryer to shut off
• Motor overload: An overloaded drum can cause the motor to overheat and cut out
• Faulty sensors: Malfunctioning moisture sensors may think clothes are dry

Problem: Error Codes

Modern dryers display error codes to help diagnose problems. Common codes vary by manufacturer, but typical categories include:

• Temperature/heating errors: Issues with the heating system or thermal sensors
• Door/latch errors: Door not properly closed or switch failure
• Drainage errors: Water tank full or drainage blocked (condenser/heat pump)
• Motor errors: Motor overload or failure
• Communication errors: Control board issues

Consult your owner's manual for specific code meanings. Many can be resolved by addressing the indicated issue and resetting the dryer by unplugging for 5 minutes.

Problem: Burning Smell

A burning smell should be taken seriously. Stop the dryer immediately and investigate:

• Lint buildup: Lint near the heating element can smoulder or burn
• Foreign objects: Items left in pockets (lighters, plastic) can melt or burn
• Belt issues: A slipping belt can create a rubber burning smell
• Motor problems: An overworked motor may produce an electrical burning smell
• Wiring issues: Damaged wiring or connections require immediate professional attention

If the smell persists after cleaning the lint filter and checking for foreign objects, don't use the dryer until it's been professionally inspected. For more on preventing dryer fires, see our safety guide.

When to Call a Professional

Some repairs are best left to qualified technicians:

• Any gas-related issues
• Electrical component replacement (heating elements, motors, control boards)
• Refrigerant issues in heat pump dryers
• Persistent problems after basic troubleshooting
• Any repair you're not comfortable attempting

When hiring a technician, look for authorised service providers for your dryer brand, or check that independent technicians are licensed and insured. Get quotes before authorising work, and ask for the faulty part to be shown to you.

Preventive Maintenance

Most dryer problems are preventable with regular maintenance. Follow our complete maintenance guide to keep your dryer running reliably for years to come.