Items in search results Go to My Vehicles NOS MOPAR HEATER CONTROL MODE VALVE 1949-1954 DODGE PLYMOUTH DESOTO 1540547 NOS OEM Mopar A-body A/C Air Conditioning Evaporator Temperature Control Switch NOS MOPAR 1968 C BODY PLYMOUTH & DODGE HEATER DASH REGULATOR CONTROL NOS MOPAR 1965-8 C BODY PLYMOUTH & DODGE HEATER BLOWER RESISTOR NOS MOPAR 1970-4 E & B BODY HEATER TEMP CONTROL CABLE NOS MOPAR 1968-70 B BODY HEATER A/C VACUUM SWITCH NOS MOPAR 1969-73 C BODY HEATER BLOWER MOTOR NOS 69 70 71 Chrysler Dash AC Vent NOS MOPAR A/C WATER VALVE 1969-70 C BODY 1971 B BODY NOS MOPAR 1959-71 A/C COMPRESSOR CRANKSHAFT SEAL KIT NOS MOPAR 1969-70-71-72-73-74 C BODY A/C DOOR ACTUATOR Heater valve, Mopar, Chrysler, vintage, NOS #03846381 NOS MOPAR 1967-68 C BODY A/C BLOWER & DEFROSTER SWITCH NOS MOPAR 1969-71 DODGE POLARA MONACO A/C BLOWER SWITCH 69 70 71 72 73 74 Charger Heater Hose Bracket non-a/c NOS MOPAR 1968-71 ALL MODELS A/C-HEATER VACUUM SWITCH

NOS MOPAR 1971 C BODY A/C & HEATER DASH SWITCH REGULATOR UNIT 1975 1976 Fury Road Runner Charger SE Cordoba NOS MoPar A/C BLOWER MOTOR 3879332 NOS MOPAR 1972 C BODY AIR CONDITIONING BLOWER RESISTOR 3 SPECIAL E-Body Mopar A/C-Heater Cable Clips Chrysler Dodge Plymouth Nos Mopar A/C Low Pressure Cut Off Switch #3441-904 Mopar 66 67 68 Belvedere Satellite GTX Heater Hose Bracket & Strap Non A/C OE AC TEMP ADJUSTING CABLE 68-69-70 ROADRUNNER/CHARGER/CORONET/SATELLITE/GTXChrysler/Dodge/Plymouth Fury AC air conditioning drier/bracket NOS MOPAR 1969-70-71 C BODY HEATER DOOR ACTUATOR W/ A/C NOS MOPAR 1969-71 CHRYSLER A/C BLOWER SWITCH C300 OTHER mopar 70-74 e body cuda challenger underdash a/c defrost duct Mopar 1966-1970 B Body Heater Tube Grommet w/AC NEW NOS Mopar 5-button AC Switch / Control Ass'y '68-up GTX Dart Cuda Satellite R/T 1955-56 Mopar a/c blower motor, NOS! heater Chrysler Dodge Plymouth DeSoto NOS MOPAR 1968-73 C BODY A/C VACUUM SWITCH W/AUTO TEMP

NOS MOPAR 1969-73 C BODY A/C BLOWER RESISTOR W/AUTO TEMP CONTROL NOS MOPAR 1957-8 PLYMOUTH CIGAR LIGHTER KNOB SAVOY BELVEDERE FURY PLAZA NOS MOPAR 1965-70 A/C WATER CONTROL VALVE MOST MODELS NOS MOPAR 1965-7 A/C WATER CONTROL VALVE A BODY & OTHER charger air conditioning gtx coronet ac a/c 68 69 b-body mopar center vent r/t Vintage 1952 MOPAR/DODGE underdash Heater unita/c heat recovery unit NOS Mopar 1965-71 Chrysler Heater vacuum switch # 2497387mitsubishi ac unit parts NOS MOPAR 1969-70-71-72-73 C BODY HEATER BLOWER SWITCHair conditioning units for multiple rooms NOS DODGE TRUCK HEATER CONTROL VALVE 72 73 74 75 76 77 78 79 80 81 82 3489847 NOS MOPAR 1974-6 C BODY AUTO TEMP A/C WATER HEATER CONTROL VALVE

NOS MOPAR 1970-71 LOW PRESSURE A/C CUTOFF SWITCH VINTAGE MOPAR CHRYSLER PLYMOUTH DODGE AUXILARY HEATER CORE ASSEMBLY NOS MOPAR 1969-70 C BODY AUTO TEMP CONTROL WATER VALVE NOS MOPAR 1973 A BODY A/C EVAPORATOR TEMP SWITCH 70 71 Cuda Challenger AC Heater Control Valve Mount Bracket 1970-74 E-body 1971-74 B-body NOS A/C Line Bracket Attaches to Firewall Mopar Mopar A/C Recirculation Housing ( 68004226AC ) NOS 69-73 Dodge Van Heater Switch & Cable Assembly 2911104 Mopar 70 71 72 1961-1968 Dodge Truck Fresh Air Temperature Control Cable - NOS Mopar Top Rated PlusSellers with highest buyer ratingsReturns, money backShips in a business day with trackingLearn More Top Rated PlusSellers with highest buyer ratingsReturns, money backShips in a business day with trackingLearn MoreYou’ve seen thermostats for as long as you can remember. But you don’t even know what these 2 settings do or what makes them different.All you know is that you’ve been told to keep your thermostat set on “Auto”.

Because the “On” will cost you more money to use. Before we get into why, we need to show you how they’re different.These 2 settings refer to how your air conditioner’s fan will run. The fan is located in the inside unit and helps distribute the conditioned air throughout your home.“Auto” means that the fan automatically works ONLY when the air is being heated or cooled. So once your home reaches the temperature set on the thermostat, the fan stops.“On” means the fan is on  24/7, even when the air isn’t being heated or cooled.Increases electric bill—Running the fan 24/7 could add about another $50 to your electric bill each month.Quickly clogs your air filter—The fan will continually pull in air through your return vents, right where your air filter is. So it’s going to nab way more dust over a shorter period of time. That means you will have to change your air filter more often.Can make you chilly in winter—The air coming through your vents when the furnace is off will feel chilly.

Blower needs more frequent maintenance—Using the fan more often means it’ll break down more often.OK, so maybe we’re being harsh on the “On” setting. While you shouldn’t use it as your “go to”  fan setting, it can give you some benefits:Makes you more comfortable—The fan will circulate air more evenly throughout your home, making you more comfortable.Can help asthma and allergy sufferers—Do you have a high efficiency HEPA filter? Running the fan more often means that filter is catching more airborne pollutants that agitate allergy and asthma symptoms.Helps you dust your home—Your vacuum kicks up a ton of dust when you use it. So, before you start vacuuming, turn your thermostat to “On.”  This will pull in airborne dust into your return air filter before the dust has the chance to settle again.Set your thermostats fan setting to “Auto” most of the time and only switch it to “On” when necessary.Did you find this article helpful? Check out our related article: How Should I Set My Thermostat?