Turn off reset button

I put in my new PN 1183051 Hepa Filter into my (whirlpool) Whispure 250 Air Filter today and could not turn off the reset button.  I held it down for  5, 10, 15, 20 seconds after it lit and again when I released pressing the reset button when it again lit.  I then called tech support and the person, who had to look it up, told me to pull out the plug for 3 minutes.  I unplugged it for about an hour.  The two red lights still light up after I turn it on and again when I try to reset it as above. Please help.  I believe this happened last year when I replaced the Hepa filter and I do not remember how the lights finally stopped lighting up. Thank you. Judy Alter