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Old 04-12-2009, 11:21 AM   #1
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Join Date: May 2007
Location: Akron, OH
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Seasonal maintenance on Carrier 9200


Hi All. Been a member here for a few years, but haven't been back in a while. I guess that's a good thing, right? No problems (knock on wood). I'm just wondering what kind of seasonal maintenance tasks I should perform on my Carrier 9200 Weathermaker furnace.

The temps are getting warmer and I suspect that we'll probably shut it down for the season at the end of this month. Before I do that, what should I be doing to make sure the system is maintained and ready to go for the next heating season?

We change the filter before the start of every season. I replaced the pressure switch in late 2007 and it's been running like a champ ever since. I haven't needed them, but I also have a replacement ignitor and flame sensor, just in case. The unit has a humidistat that adds moisture to the forced hot air. We turned it off because it the water would condense on the colder walls in the house and cause streaks.

I'm assuming that I wold do things like: replace the air filter, clean condensate pump tray, ... what else? I feel like I'm missing something? Do I need to do anything with the humidistat? We don't use it, but should it be cleaned or serviced for any reason?

Thanks for any help you can offer.

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Old 04-12-2009, 11:49 AM   #2
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Seasonal maintenance on Carrier 9200


You are doing pretty well already. You can remove the cover of the burner box and with a bottle brush clean any dirt from the burners and intake area. Carefully look where the air intake pipe attaches to that box and inside there is a circular plastic strainer thingy. If a leaf/wasps etc gets sucked into the pipe it will end up there and cause restricted airflow and problems. Don't move the drain pipes to the trap as they get brittle and crack and are EXPENSIVE. If you can remove the flames sensor you can clean it with fine emory paper or steel wool. Not much else to do other than check the intake/exhaust pipes outside. If you have a concentric kit/pipe in pipe deal outside put your fingers in the intake pipe and check for spider webs once a year. The humidifier should be cleaned annually and sometimes with CLR to descale it.

Good Luck


Last edited by yuri; 04-12-2009 at 12:29 PM.
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Old 04-12-2009, 03:11 PM   #3
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Seasonal maintenance on Carrier 9200


Yes keep a check on the vent & or intake pipe birds love to build nest in them if they are able to get in
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Old 04-12-2009, 07:50 PM   #4
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Seasonal maintenance on Carrier 9200


Had wasps build a nest in one. Sucker dried out in the fall and the first time the furnace started it got sucked into the burner box screen. No end to the strange things a tech can run into. Changing the board does not always solve the problem. LOL
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Old 04-12-2009, 09:19 PM   #5
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Seasonal maintenance on Carrier 9200


Great. Thanks for the tips, guys. I appreciate the help. I'm not surprised that you find all kinds of strange things in there. Hopefully, I won't find anything unusual, but if I do at least I won't be surprised. Thanks again.
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