I HAVE A 25-PVDC THAT HAS BEEN WORKING FINE. HEAT SETTING 1 OR 2 AND BLOWER SPEED THE SAME. NOW THAT IT IS GETTING COLDER I HAVE INCREASED BOTH SETTINGS AND NOTICE A DROP IN ROOM TEMP. I PUT A THERMOMETER IN FRONT OF THE GRILLE OVER THE DOOR AND HAVE FOUND AS I RAISE THE SETTINGS THE TEMP FALLS. HEAT 2 BLOWER 2 TEMP 245*, HEAT 3 BLOWER 3 TEMP 205*, BLOWER 4 HEAT 4 TEMP 205*, HEAT 5 BLOWER 5 TEMP 205*, BLOWER 9 HEAT 9 TEMP 225*. I LET THE UNIT RUN 30 MINS AT THE NEW SETTINGS EACH TIME. ALSO TRIED HEAT 9 BLOWER 7 TEMP JUMPED UP TO 230*, BUT NOT RECOMMENDED IN OWNERS MANUAL TO USE TWO DIFFERENT SETTINGS. I AM WONDERING IF THIS NORMAL OR HAS ANYONE HAD OTHER RESULTS. THE HOUSE SEEMS TO STAY WARMER AT THE LOWER SETTING OF 2-2.