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    confusedDIYer's Avatar
    confusedDIYer Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Apr 12, 2008, 10:55 AM
    Honeywell RTH230B filter indicator
    The filter replacement indicator came on, on the LED display of my RTH230B thermostat. What filter is it talking about? Is there some microscopic filter in the thermostat that I'm supposed to replace? Or does the thermostat think it needs to remind me to have my furnace serviced? (Oil furnace with baseboard hot water.) Or is it telling me to replace a filter in a non-existent A/C? The owner's manual says only that the indicator comes on "after 500 hours of use."

    Thank you.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Apr 12, 2008, 11:16 AM
    Replace the furnace filter. That is what it means. If you do not have a air filter then just reset. Follow the directions in your owners manual for all settings.
    confusedDIYer's Avatar
    confusedDIYer Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Apr 12, 2008, 06:13 PM
    Ahh, a non-problem. Thank you for your prompt response.
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