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| Symptom | Things to Troubleshoot |
| Dead Aid | Battery charge/placement/size Occluded Earmold Collapsed/clogged tubing MTO switch on "T’ or "O" Occluded Microphone |
| Weak Aid | Weak/leaking battery Partially occluded microphone opening Partially occluded earmold Moisture in tubing Partially collapsed/clogged tubing |
| Feedback | Volume control set too high Broken/Improper fitting earmold Cracked/loose tubing Internal components |
| Distortion | Weak battery/corroded contacts Partially occluded microphone opening Partially occluded tubing Unvented earmold |
| Intermittent sound | Dirty/broken battery contacts Collapsing tubing Partially occluded earmold Dirty/defective volume control |
| Noisy aid | Weak/dirty battery Internal components Dirty/defective volume control MTO switch on "T" instead of "M" |