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Supco

Supco 43054 Electronic Digital Wall Thermostats with Blue Back Light, 45 to 95 Degree F, 20-30 VAC

  • Based on 535 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, May 19
Order within 15 hours and 29 minutes
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Features

  • Electronic digital accuracy
  • Large, easy to read LCD
  • Filter change indicator
  • No programming required
  • 3 year warranty

Description

For conventional systems and single-stage heat pumps with blue back light. Electronic digital accuracy. Large, easy to read LCD. Filter change indicator. No programming required. No leveling required. Terminations: RC/O,RH/B, Y, W, G, R. Bimetal freeze protection. Latching relays for system compatibility. Soft touch keypad. Low battery indicator. Indiglo Backlight. Easy, front load battery access. 2 AA batteries included. Are compatible with: 24 VAC heat/cool, Heat only or cool only systems, gas, electric or oil systems, millivolt systems, 2 wire hydronic systems (Not for use with 110/220V systems). Have These Specifications: 20-30 VAC, 50/60 Hz, Current draws 0.1 to 1.5 amps, Temperature set range: 45 - 95 degrees Fahrenheit. Operating differential +/- 1 degrees Fahrenheit. Compressor protection: 4 min. delay on break. 3 year warranty.

Brand: Supco


Model Name: B434608


Product Dimensions: 1.25"D x 4.75"W x 4"H


Controller Type: Touch


Special Feature: 2 - AA batteries


Controller Type: Touch


Additional Features: 2 - AA batteries


Specific Uses For Product: Heat Pump


Temperature Control Type: Digital


Connectivity Technology: Wired


Power Source: Battery Powered


Voltage: 30 Volts


Display Type: Digital


Control Type: Touch


Control Method: Touch


Mounting Type: Wall Mount


Backlight: Yes


Number of Batteries: 2 AA batteries required.


Item Dimensions D x W x H: 1.25"D x 4.75"W x 4"H


Item Weight: 8 ounces


Brand Name: Supco


Model Name: B434608


Included Components: Assembly Guide


Model Number: 43054


UPC: 049694430540


Global Trade Identification Number: 40


Manufacturer: Supco


Unit Count: 1.0 Count


Color: Blue


Product Style: Industrial


Material Type: Bimetal


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, May 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • RV workaround for automatic heater firing at 41 deg. and below.
Review Image by BarneyRubble
Review Image by BarneyRubble
Review Image by BarneyRubble
Works great. For RV use BE AWARE IT WILL ALWAYS FIRE THE HEATER AT TEMPERATURES 41DEG AND BELOW!!!, even if it is turned off, and even if the batteries are removed!!!! This is noted on the owners manual under "Mechanical Heat Backup". Not so good for us up north where the RV is outside all winter. You must remove the thermostat from the wall to prevent this. To permanently disable this feature you can remove the bimetallic switch from the thermostat. To remove the bimetallic switch, remove the thermostat from the wall/backing plate and turn it over. There is a large silver colored square device soldered to the lower left corner of the circuit board, below where the batteries are. "SW5" identifies it on the board. If you look closely it has "5 C" stamped on it. (Of course 5deg C is 41deg F). You can carefully snip it off where it is soldered to the board, or I just snipped one leg off and bent it up to break the connection but left it there in case I ever want this feature back. This is a good safety feature for household use in that it will still keep the heat above freezing even it the batteries die in the thermostat. ... show more
Reviewed in the United States on October 21, 2017 by BarneyRubble
    • An upgrade to the same.
Exact replacement for an original. Easy to set, easy to use. Nice bright display
Reviewed in the United States on September 17, 2025 by Jim Polles
    • Perfect...GREAT product. Highly recommend.
Perfect for my old Lennox Pulse 21. Installed a couple of weeks ago and it works just as it should. Very happy with this purchase.
Reviewed in the United States on February 11, 2026 by Dan
    • I can't imagine a better non-programmable thermostat
When I was converting my old HVAC system from full line voltage to low-voltage digital controls, I bought this thermostat to control the relays I used for the conversion. One of the features I like most is the adjustable "span" that controls the temperature differential between shut-off and turn-on. During moderate weather, you can adjust the span to 1 and the set temperature can be maintained very closely without putting an undue burden on the system. During more extreme weather, you can set the span as high as 3 degrees for wider temperature swings, to avoid the short-cycling that can reduce the life of your HVAC system. Many thermostats don't have this feature. Another feature I like is the blue backlight, which also stops working when the batteries are low to conserve power. And speaking of batteries, I like that it uses AA instead of shorter-life AAA, and I don't have to disassemble anything to replace them because they're right behind a door that swings open from the front. The one design feature I find somewhat odd is the fact that they located the filter replacement reminder reset button so prominently (the small button) on the front, instead of behind the door, but the good news is that resetting the reminder requires pressing and holding the button for 3 seconds to prevent resetting it accidentally. Finally, I'll mention the main reason I was looking for a thermostat in the first place. I already had a Honeywell thermostat that I had bought for my low-voltage conversion, but in testing it I discovered that it was just too sensitive to transitory temperature variations, such as even minor handling of the thermostat case itself. That's something you can't know until you actually make the purchase, and luckily I found that the Supco strikes a better balance in this regard, with a few extra features thrown in. Can you tell that I'm delighted with this thermostat? The whole low-voltage conversion was a bit of a pain, but definitely worthwhile, and even more so because I found the right thermostat. ... show more
Reviewed in the United States on October 23, 2013 by GaryM
    • AWFUL!!
My previous thermostat worked perfectly but the one button started sticking so I bought this supposedly identical replacement...now, I set it to 76...it won't go on until the 'in-house temp' reaches 78...THEN...it won't shut off until it's 73!!! :(
Reviewed in the United States on January 8, 2026 by tiprtst
    • Seems like a good thermostat. Batteries were to low to operste. Replaced...
Unit us nice and fairly easy to install. Batteries were almost dead.. Had to replace them and it worked fine
Reviewed in the United States on April 26, 2025 by Marlayna T
    • Direct fitment for replacement
Direct fitment for previous thermostat. Took some wiggling to get it to slide in the ports and catch correctly but pretty pleased overall. I didnt have to take the back piece off the wall and rewire anything so that's great. Also glad they put a backlight in.
Reviewed in the United States on November 23, 2025 by Sarah Kirkhart
    • doesn't work well
I had the same unit in my house and it was not working right, turns out that I did not need the complete unit, used the front control piece and it is working. correction, it is not a very accurate device.
Reviewed in the United States on May 18, 2025 by Ron Bockman

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