Hi. There is likely a reset procedure to clear the filter indicator. What brand of thermostat do you have?
Sorry... My connection is dreadful today. Most thermostats just have a timer that tells when to change the filter. The timer has to be reset once the indicator lights up. The procedure is different for almost every thermostat brand, but should be in the owners manual. If you tell me what thermostat you have I'll help you find the right procedure.
I'll check back with you in a little while -
The thermostat is a Honeywell.
Does it have a button with the letter i above the temperature buttons?
Yes. The make is a honeywell chronotherm iv plus
Ok. - To reset the filter indicator you press the "i" button until you see the filter indicator - It will show 0 days left - then press the time up button (next to the wake button) to reset the timer the 0 - then press run program
you have to press the i button more than once to cycle through the different options
'Filter" has stopped flashing, but it appears now that a program has been set. Thanks for your help. We will have our local hvac tech reprogram our thermostat when he comes for the summer checkup.
As long as the word HOLD is in the display the thermostat doesn't follow the program.