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Item #:
31765030
Supplying Demand Q105 3120A357 Furnace Heat Pump Sequencer 1DPST 1SPST 24 Volt On 1-110 Off 1-110
Item #:
31765030
XAF 25447
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Imported from USA store
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Supplying Demand is lowering the price of repair, reducing waste by utilizing reusable or recyclable packaging, and empowering customers through educational materials.
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Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
Dual Functionality
This sequencer offers both 1DPST and 1SPST capabilities, ensuring versatile operation for various furnace and heat pump configurations, enhancing compatibility and usability.
Voltage Flexibility
Operating at 24 volts, the product is designed to easily integrate into most HVAC systems, providing a reliable and efficient solution for temperature control and energy savings.
Precise Control
With a unique timing mechanism of 1-110 on/off cycles, this sequencer ensures optimal performance and precision in managing heating systems, reducing wear and extending equipment life.
Product Details
- Compatible with various part numbers including 525-37327-000, ZC24A34-5, IES24A34-5, 24A35-5, 24A34-54, 51172-32, 33232, and 33832
- Designed to control heating elements and blower motors in electric, gas, or oil heat systems
- Switches on at 1-110 seconds and off at 1-110 seconds with contacts M1-M2 turning on first and off last
- Operates on a 24 volt control circuit with a five-second delay between subsequent stages, unless they function together
- UL and CSA approved for use in electric furnaces, heat pumps, gas furnaces, and oil furnaces
- Compatible with various major brands, but fitment should be verified with the specific application
| Connector Type | Screw |
| Contact Type | Normally Open |
| Current Rating | 30 A |
| Mounting Type | DIN Rail Mount |
| Operation Mode | Electric |
| Wattage | 720 watts |
| Coil Voltage | 24 volts |
| Contact Current Rating | 30 A |
| Maximum Switching Current | 30 A |
| Maximum Switching Voltage | 24 volts |
| Minimum Switching Voltage | 24 volts |
| Operating Time | 5 seconds |
| Specification Met | CSA, UL |
| Brand Name | Supplying Demand |
| UPC | 812116032574 |
| Unit Count | 1 Count |
| Included Components | Sequencer |
| Manufacturer | Supplying Demand |
| Model | SDNS105 |
| Part Number | SDNS105 |
| Contact Material | Silver Copper |
| Item Weight | 1 lbs (450 grams) |
Who Should Buy?
-
HVAC Technicians
Ideal for technicians needing reliable sequencers for furnace and heat pump installations and repairs.
-
Homeowners
Beneficial for homeowners aiming to maintain efficient heating systems in their residences.
-
DIY Enthusiasts
Perfect for DIYers looking to upgrade or troubleshoot heating systems without professional assistance.
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Non-Technical Users
Not suitable for users uncomfortable with electrical components or HVAC systems installation.
Product Description
Supplying Demand Q105 3120A357 Furnace Heat Pump Sequencer 1DPST 1SPST 24 Volt On 1-110 Off 1-110
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
How did Supplying Demand start?
Answer: Started by professional service technicians with combined 50+ years experience. -
Question:
Why do they love what they do?
Answer: Because it's what they do. Constantly seeking out new parts to bring to market. -
Question:
What problem are they solving?
Answer: Lowering the price of repair, reducing waste, empowering customers through education. -
Question:
Will this replace a 12sh22 308771 24v thanks
Answer: As long as it’s 24v and the wiring matches it should be ok. -
Question:
Does the part look exactly like the pictures?
Answer: Yes, it looks exactly like the pictures. Mine did and has worked perfectly. -
Question:
Will this work on 2003 coleman eb15b furnace with two elements?
Answer: You must understand schematic drawing and what your existing relay looks like to know if it will be a compatible replacement.
Supplying Demand HVAC Controls Editorial Review
The Supplying Demand Q105 3120A357 Furnace Heat Pump Sequencer is a 1DPST 1SPST 24 Volt On 1-110 Off 1-110 sequencer that is designed to replace existing relays in furnaces. It has received mixed reviews from customers, with some reporting that it worked well for a period of time before failing, while others found it to be a perfect replacement and were able to repair their own furnace. However, there were also complaints about the quality of the sequencer, with one customer reporting that a metal clip fell off during installation. Overall, it seems that this sequencer may be a suitable option for some customers, but others may want to consider alternatives.
Customer Reviews & Ratings
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Pros
- Can be a suitable replacement for existing relays in furnaces
- Some customers were able to repair their own furnace with it
- Improved heating efficiency for some customers
Cons
- Failed within a year for some customers
Platform Trust & Buyer Confidence
JG
Jazz
Verified buyer
“Easy to use and always helpful and sorts any issues I've had past and present”
1 September 2026 · via Trustpilot
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Emmanuel
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“I always receive support when I engage customer service. Overall my experience with UBUY has been top notch. Keep up the good work.”
31 August 2026 · via Trustpilot
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“The delivery was fast and the product came undamaged and authentic.”
29 August 2026 · via Trustpilot
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25 August 2026 · via Trustpilot
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Hengo
Verified buyer
“Fast, convenient and cheap. Great store!”
27 August 2026 · via Trustpilot
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Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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XAF 25447
Order now and get it around Sunday, September 13
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Features & Benefits
- Private-label manufacturer specializing in appliance and HVAC parts
- Dedicated to delivering high-quality components
- Lowering the price of repair
- Utilizing reusable or recyclable packaging
- Empowering customers through educational materials
- Practical repairs at a reasonable price
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