Did you read in your owners manual around the annual maintenance recommended by the manufacturer? Most manufacturers have a list of tasks the recommend having done annually by a qualified service technician.
Most manuals include recommending an inspection of the glass, gasket, logs, firebox, burner ignition and control compartment.
Keeping your fireplace tuned up will keep them running smooth and extend their life!

SERVICE CALL OPTIONS
a. All Inclusive Service – Troubleshooting + Tune-up + warranty = $336
(Good for ONLY Heat & Glo, Heatilator, & Quadra-fire direct vent fireplaces or inserts)
i. Includes Troubleshooting & labor
ii. Parts Additional
iii. Full Tune-up & cleaning of unit
iv. 90 day service warranty (covers return trips and additional labor, pertaining to service call)
b. Troubleshooting + Tune-up (no warranty) = $279.95
i. Diagnosis/Troubleshooting + 30 minutes labor
ii. Parts Additional
iii. Full Tune-up & cleaning of unit
iv. Return trips not included
c. Tune-up Only = $189.95
i. Full Tune-up & Cleaning of Unit
ii. No diagnosis of issues – no additional labor
iii. Return trips not included
d. Troubleshooting Only = $153
i. Diagnosis/Troubleshooting + 30 minutes labor
ii. Parts Additional
iii. Return trips not included
***Service Calls cannot be upgraded to the next level in home***