Attend site to service gas ducted heater and add on cooling system.<br />
Remove the flame sensors to clean and check.<br />
Remove the ignition probe to clean and check.<br />
Remove burner cover to clean and check burners.<br />
Test and set gas pressure.<br />
Check the flue.<br />
Check condensate drain.<br />
Remove and clean the return air filter.<br />
Run heater to check everything is running correctly, all running correctly.<br />
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Climb on the roof to check the add on cooling system.<br />
Found everything is in great working order.