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GE 453XT1AJ2E 75VA CONTROL TRANSFORMERS 120 24 VAC
$17.50
Time Remaining: 13d 4h 40m
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New MG Electronics 24VAC Class 2 Transformer Model MGT2450
$18.99
Time Remaining: 7h 35m
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24VCT 24V 12V Transformer 12V 0 12V CT 3A 110Vac 220Vac to 24Vac 12Vac free shi
$19.95
Time Remaining: 17d 17h 55m
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Basler Electric 200 230 VAC Primary 24 VAC Secondary Transformer 75 VA Class 2
$25.00
Time Remaining: 17d 19h 6m
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LOT of 2 MARS CONTROL TRANSFORMERS 50302 120V VOLT 24Vac 40VA 40 VA w MNT PLATE
$24.99
Time Remaining: 25d 20h 21m
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Power Transformer 117VAC 24VAC Center Tap 12 0 12 3A 28N091
$18.95
Time Remaining: 5d 1h 19m
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GENERAL ELECTRIC GE RT 1 REMOTE CONTROL TRANSFORMER 24 VAC NEW
$79.99
Time Remaining: 11d 22h 40m
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120V 24V Transformer 120VAC 24VAC 125A 57LEIB24125 Irritrol Rain Dial RD 600
$19.98
Time Remaining: 2d 20h 8m
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Tyco Electronics Control Transformer Box Of 10 120VAC to 24VAC 50VA 50 60Hz
$100.00
Time Remaining: 5d 23h 8m
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Transformer HCT 01E0BB06 Pri 120VAC Sec 24VAC 40VA
$16.00
Time Remaining: 16d 20h 6m
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Dayton Control Transformer 120V 60Hz 24VAC Model 4X744A
$23.00
Time Remaining: 23d 3h 59m
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SQUARE D Transformer 9070T500D23 500VA 240 120 Pri 24vac Sec
$187.00
Time Remaining: 29d 17h 16m
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Jard Magnetics 4031F 40va 120 208 240 Primary VAC 24 VAC Transformer NEW
$7.00
Time Remaining: 4d 21h 37m
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MG Electronics 24 VAC Class 2 Transformer 20 VA w LED MGT 2420 Free S
$19.99
Time Remaining: 16d 1h 5m
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Adams Rite 4606 110VAC to 24VAC Plug In Transformer
$48.00
Time Remaining: 11d 22h 35m
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VINTAGE BASLER TRANSFORMER 24VAC 30VA BE116430AAA USED
$14.99
Time Remaining: 4h 43m
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New Sloan Optima Transformer EL 154 120 vac 24 vac 50 va
$16.99
Time Remaining: 15d 23h 2m
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NEW Tyco Transformer PRI 240V SEC 24VAC 50 60HZ 30VA 4000 02M04K109 63005 002
$19.99
Time Remaining: 29d 17h 21m
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Hammond Manufacturing 25 VA Single Phase Control Transformer 120 VAC to 24 VAC
$15.00
Time Remaining: 16d 23h 3m
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Lot of 5 NEW RIB Transformer TR50VA005 Functional Devices Inc 120V 24VAC 50 VA
$19.95
Time Remaining: 5d 5h 5m
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Johnson 40va transformer 24VAC primary foot mounting
$18.25
Time Remaining: 17d 6h 5m
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MG Electronics 24VAC Class 2 Transformer Model MGT2450
$19.00
Time Remaining: 7d 14h 44m
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TRANSFORMER HCT 09E0BB06 40VA 208 240X24VAC
$39.99
Time Remaining: 2d 32m
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ALTRONIX T24130D Class 2 Transformer24VAC100 VA G7483481
$29.01
Time Remaining: 22d 19h 36m
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Honeywell AT140A 1000 Transformer Class 2 24 VAC 40 VA 120 V 60 HZ FREE SHIP
$22.73
Time Remaining: 20d 19h 58m
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Dormeyer DCT 40 120 Foot or 1 2 NPT Hub 120VAC 24VAC Transformer 40VA New
$18.00
Time Remaining: 25d 20h 34m
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Functional Devices Inc RIB TR100VA001 Class 2 Transformer 24VAC 100 VA 1 PH
$33.00
Time Remaining: 2d 18h 3m
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White Rodgers 90 T60C3 Class 2 Transformer 24VAC 60 VA New
$21.00
Time Remaining: 10d 17h 35m
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Power Transformer 117VAC 24VAC Center Tap 12 0 12 5A 28N073
$23.95
Time Remaining: 4d 23h 39m
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Tyco Electronics PRI 277VAC 40VA 50 60Hz SEC 24VAC Transformer 1091226
$19.99
Time Remaining: 26d 17h 25m
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Tyco 4000 13E07K662 Transformer 5 1611455 7 40VA 24 VAC
$16.99
Time Remaining: 9d 19h 43m
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Basler BE116440CAA 120V 60HZ 48A 24VAC 40VA plug in transformer power supply
$19.43
Time Remaining: 17d 17h 21m
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Core Components 120 024 075 1TF CB 120v PRI 24vac 75va transformer NIB IA
$25.00
Time Remaining: 5d 2h 2m
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PACKARD 120 208 240V CLASS 2 TRANSFORMER 24VAC 40VA NEW BOXED
$26.50
Time Remaining: 28d 14h 32m
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Lot of 2 Sloan Optima EL154 120 VAC 24 VAC 50 VA Transformer
$29.00
Time Remaining: 17d 6h 29m
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Jard Hub Mounted Step Down Transformer NEMA Class II 24VAC Out 44520 7541MCB
$39.95
Time Remaining: 17d 43m
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24VAC 2500MA Power Supply Input 120VAC 60Hz 600ma Output 24VAC 2500mA
$24.99
Time Remaining: 18d 6h 3m
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Dongan 33 170 145 Industrial Control Transformer 170kVA 120 24VAC New
$39.95
Time Remaining: 21d 19h 24m
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Transformer 120 208 240 480V X 24VAC 75VA WITH CIRCUIT BREAKER FOOT MOUNT
$49.95
Time Remaining: 19d 18h 10m
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Core Components 120 024 050 TF CB 120v PRI 24vac 50va transformer NIB IA
$15.00
Time Remaining: 5d 2h 2m
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NEW Tyco Transformer PRI 208 240 SEC 24VAC 50VA 50 60Hz 24L5301 4000Y09AW18K08
$19.99
Time Remaining: 28d 23h 51m
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4031PT POWER TRANSFORMER PRI120 208 240V SEC24VAC 40VA
$79.95
Time Remaining: 3d 1h 57m
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Transformer AC Power Supply 24 VAC center tapped
$25.00
Time Remaining: 12d 4h 27m
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SIEMENS MT0050B TRANSFORMER PRIM 240 480VAC SEC 24VAC 50VA FUSED LNC
$19.99
Time Remaining: 10d 20h 25m
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12V Transformer 12V 0 12V CT 3AMP 3000mA 110VAC to 12VAC 24VAC NEW
$19.99
Time Remaining: 26d 22h 36m
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CUTLER HAMMER C0075E1B INDUSTRIAL CONTROL TRANSFORMER PRI 120 240 SEC 24VAC
$45.00
Time Remaining: 3d 19h 40m
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8S11 TRANSFORMER FOR FURNACE 120VAC 24VAC 40W 280 VNL GOOD CONDITION
$18.00
Time Remaining: 16d 16h 16m
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RIB TR40VA022 Class 2 Transformer24VAC40 VA1 PH G8490011
$15.18
Time Remaining: 4d 10h 40m
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USED COM 4000 04E07BB132 TRANSFORMER PRI 480 VAC SEC 24VAC 40VA 0702G CLASS 2
$19.99
Time Remaining: 6d 5h 36m
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NEW CORE 120 024 075 TF CB Control Transformer 75VA 120 24 VAC NIB
$19.99
Time Remaining: 7d 21h 19m
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Universal Transformer 24VAC 40VA 48W UB2440W Class 2 Transformer UL Listed
$22.79
Time Remaining: 2d 4h 38m
Buy It Now for only: $22.79
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Vintage Basler Electric Transformer 24VAC 30VA BE116430AAA Used Tested
$19.95
Time Remaining: 4d 3h 45m
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Johnson Controls Y65A13 0 120VAC 24VAC Transformer
$20.99
Time Remaining: 15d 53m
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REVERE RT2420 UL PLUG IN TRANSFORMER 24VAC 20VA
$17.10
Time Remaining: 16d 22h 8m
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HAMMOND PT50PG TRANSFORMER PRIM 120 240VAC SEC 24VAC 50VA NIB
$24.99
Time Remaining: 14d 20h 1m
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Hartland Controls HCT60D0BB06 24vac 50va transformer new Bulk IA
$20.00
Time Remaining: 5d 2h 3m
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PACKARD 120 208 240V CLASS 2 TRANSFORMER 24VAC 40VA
$22.50
Time Remaining: 19d 17h 43m
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Honeywell XFMR AT175F1023 PRI 120 208 240V SEC 24VAC Listed Class 2 Tranformer
$29.75
Time Remaining: 3d 43m
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4031PT POWER TRANSFORMER 120 208 240 VOLT 24 VAC 40VA
$59.95
Time Remaining: 26d 6h 28m
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2 Teca Transformers for Boat Lighting 50D5424SD 120 Vac 24 Vac 50 VA
$96.00
Time Remaining: 24d 20h 40m
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STEP DOWN TRANSFORMERS 75VA 120 24VAC 60Hz 30T 5019 24V
$19.99
Time Remaining: 11d 17h 27m
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LOT OF 2 NEW HONEYWELL AT72D1683 TRANSFORMER 120V PRIMARY 24 VAC SECONDARY 40VA
$45.00
Time Remaining: 10d 23h 32m
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RIB TR50VA006 CLASS B TRANSFORMER 50VA 24VAC 50 60 HZ 277V NEW IN BOX FREE SHIP
$19.99
Time Remaining: 23d 5h 29m
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My thermostat for my heating and air just completely went blank. It's digital any ideas why?

It depends is your t-stat battery powered if it is change the batteries, if not it is powered by a 24vac transformer, and it could have went bad, or the t-stat is dead.

Also a wire could have came loose either the red 24vac power wire to the transformer or the common black wire.

Also the 3 amp fuse on the furnaces control board may have blown for some reason.

You need a volt meter and start checking around but if you don't know how to use it, you had better call in the professionals.

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