Michel & Siso are very knowledgeable and explain everything to where I could understand! Amazing experience! Thank you will always come here for any AC needs. Trustworthy and excellent customer service.
4.9/5 based on 4750 reviews
ProStat+ PSP4273 Programmable Thermostat – 4 Heat / 2 Cool, Humidity Control, Heat Pump & Dual Fuel Compatible
ProStat+ PSP4273 Programmable Thermostat – 4 Heat / 2 Cool, Humidity Control, Heat Pump & Dual Fuel Compatible
Low stock: 1 left
ProStat+ PSP4273 programmable thermostat with 4 heat/2 cool control, humidity management, heat pump and dual-fuel compatibility, and optional WiFi.
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Advanced thermostat supporting up to 4 heat and 2 cool stages
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Built-in humidity, dehumidification and reheat control capabilities
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Compatible with conventional, heat pump and dual-fuel HVAC systems
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7-day, 5+1+1-day, 1-day or non-programmable operation
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Optional WiFi, remote sensors, geofencing and fresh-air ventilation control
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Specifications
Specifications
Specification
Details
Brand
ProStat+
Part Number / MPN
PSP2111
Product Type
Programmable HVAC Thermostat
Heating Stages
Up to 2 Heat
Cooling Stages
1 Cool
Programming
7-Day / 5+1+1-Day / 1-Day
Periods Per Day
Up to 4
Electrical Rating
20–28 VAC, 5 VA Max
Control Range
35°F–99°F
Heat Pump Compatible
Yes
Auto Changeover
Yes
WiFi
Optional Module Required
WiFi Frequency
2.4 GHz with Optional Module
Outdoor Sensor Ready
Yes
Dry Contact Input
Yes
Keypad Lock
Yes
Languages
English, Spanish, French
Application
Residential HVAC Control
description
description
ProStat+ PSP4273 Programmable Thermostat – 4 Heat / 2 Cool, Humidity Control, Heat Pump & Dual Fuel Compatible
The ProStat+ PSP4273 is a premium programmable HVAC thermostat designed for advanced residential heating and cooling systems. It supports up to 4 stages of heating and 2 stages of cooling and can control compatible conventional gas/electric, heat pump, and dual-fuel systems.
A major feature of the PSP4273 is its integrated indoor air quality and humidity control capability. It can control humidification, dehumidification, reheat, and fresh-air ventilation on properly configured HVAC systems. Flexible programming includes 7-day, 5+1+1-day, 1-day, or non-programmable operation, with up to four scheduled periods per day.
Key Features & Function
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ProStat+
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Part Number: PSP4273
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Premium programmable HVAC thermostat
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Up to 4 Heat / 2 Cool
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Humidity control
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Humidification control
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Dehumidification control
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Reheat capability
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Fresh-air ventilation control
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Programmable auxiliary output
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Conventional gas/electric compatible
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Heat pump compatible
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Dual-fuel compatible
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Auto changeover
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7-day programming
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5+1+1-day programming
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1-day programming
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Non-programmable option
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Up to 4 programmable periods per day
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Adjustable staging deadbands
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Adjustable staging timers
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Vacation mode
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Smart recovery
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Setpoint limiting
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Equipment runtime tracking
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Condensate overflow warning capability
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Remote temperature sensor capability
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Optional WiFi connectivity
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Optional geofencing with compatible WiFi module
Product Details & Specifications
| Specification | Details |
|---|---|
| Brand | ProStat+ |
| Part Number / MPN | PSP4273 |
| Product Type | Programmable HVAC Thermostat |
| Maximum Heating Stages | Up to 4 Heat |
| Maximum Cooling Stages | Up to 2 Cool |
| Programming | 7-Day / 5+1+1-Day / 1-Day / Non-Programmable |
| Periods Per Day | Up to 4 |
| Heat Pump Compatible | Yes |
| Dual-Fuel Compatible | Yes |
| Gas/Electric Compatible | Yes |
| Auto Changeover | Yes |
| Humidity Control | Yes |
| Humidification | Yes |
| Dehumidification | Yes |
| Reheat Control | Yes |
| Fresh-Air Ventilation | Yes |
| Remote Sensor Capability | Yes |
| WiFi | Optional Module |
| Geofencing | Available with Optional WiFi Module |
| Application | Residential HVAC Control |
The PSP4273 is specifically identified by ProStat+ as the 4 Heat / 2 Cool model with humidity control.
🛠️ HVAC Depot Pro Tip
The PSP4273 is different from the PSP4272 primarily because the PSP4273 adds advanced humidity and indoor-air-quality control capabilities.
This thermostat is particularly useful when the HVAC system requires control of:
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Humidification
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Dehumidification
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Reheat
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Fresh-air ventilation
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Multi-stage heating
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Two-stage cooling
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Heat pump auxiliary heat
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Dual-fuel operation
Also note that the standard PSP4273 uses optional WiFi connectivity through a compatible plug-in module. Do not advertise the standard PSP4273 as having built-in WiFi unless the required WiFi module is included.
Equipment / Model Compatibility
The ProStat+ PSP4273 is designed for compatible residential HVAC systems including:
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Goodman HVAC systems
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Amana HVAC systems
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Residential air conditioners
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Gas furnaces
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Electric heating systems
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Heat pump systems
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Dual-fuel systems
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Multi-stage HVAC systems
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Two-stage cooling systems
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Systems requiring humidity control
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Systems requiring dehumidification control
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Fresh-air ventilation applications
The thermostat supports configurations of up to 4 Heat / 2 Cool. Exact compatibility should be determined from the HVAC system's equipment type, staging, wiring, auxiliary heat configuration, and indoor-air-quality accessories.
Specification
Specification
Refund policy
Refund policy
Refund & Return Policy
Last Updated: June 2026
At HVAC Parts & Equipment Depot, customer satisfaction is important to us. This Refund & Return Policy explains how returns, exchanges, and refunds are handled for purchases made through TopHVACParts.com.
Return Eligibility
We accept returns within 30 days of delivery.
To qualify for a return:
- The item must be unused, uninstalled, and in its original condition.
- The item must be returned in its original packaging.
- Model numbers and serial numbers must match the original purchase records.
- Proof of purchase or order confirmation is required.
Non-Returnable Items
The following items are not eligible for return or refund:
- Installed or used parts.
- Products showing signs of installation, modification, or damage caused after delivery.
- Items missing original packaging.
- Sale or clearance items.
- Special-order or custom-order products.
- Returns requested more than 30 days after delivery.
Restocking Fee
Approved returns may be subject to a 20% restocking fee.
The restocking fee will be deducted from the refund amount after the returned item has been inspected and approved.
Damaged, Defective, or Incorrect Items
If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery.
Email: support@tophvacparts.com
Phone: (214) 734-5222
We may request photographs and additional information to help process your claim.
If the claim is approved, we will provide a replacement, exchange, or refund at no additional cost to you.
Exchanges
We replace items only if they are defective, damaged upon arrival, or incorrectly shipped.
To request an exchange, contact us at:
Refund Process
Once your return is received and inspected, we will notify you by email regarding approval or rejection of your refund request.
If approved:
- Refunds will be issued to the original payment method.
- Processing typically takes 7–14 business days after approval.
- Your financial institution may require additional time before the refund appears in your account.
Return Shipping
Customers are responsible for return shipping costs unless the return is the result of:
- Our shipping error,
- A defective product,
- A damaged product received upon delivery.
Original shipping charges are non-refundable.
We recommend using a trackable shipping service and purchasing shipping insurance for higher-value items.
Return Address
HVAC Parts & Equipment Depot
1135 E Plano Parkway, Suite 8
Plano, TX 75074
United States
Professional Installation Notice
Many HVAC products require installation by a licensed HVAC professional.
HVAC Parts & Equipment Depot is not responsible for damages resulting from improper installation, misuse, unauthorized modifications, or failure to follow manufacturer instructions.
Special Orders
Special-order products must be picked up within 30 days of purchase unless other arrangements have been approved.
Unclaimed special-order products may be returned to the manufacturer and may be subject to applicable restocking fees.
Contact Us
If you have questions regarding returns, refunds, or exchanges, please contact us:
HVAC Parts & Equipment Depot
Phone: (214) 734-5222
Email: support@tophvacparts.com
Refund & Return Policy
Last Updated: June 2026
At HVAC Parts & Equipment Depot, customer satisfaction is important to us. This Refund & Return Policy explains how returns, exchanges, and refunds are handled for purchases made through TopHVACParts.com.
Return Eligibility
We accept returns within 30 days of delivery.
To qualify for a return:
- The item must be unused, uninstalled, and in its original condition.
- The item must be returned in its original packaging.
- Model numbers and serial numbers must match the original purchase records.
- Proof of purchase or order confirmation is required.
Non-Returnable Items
The following items are not eligible for return or refund:
- Installed or used parts.
- Products showing signs of installation, modification, or damage caused after delivery.
- Items missing original packaging.
- Sale or clearance items.
- Special-order or custom-order products.
- Returns requested more than 30 days after delivery.
Restocking Fee
Approved returns may be subject to a 20% restocking fee.
The restocking fee will be deducted from the refund amount after the returned item has been inspected and approved.
Damaged, Defective, or Incorrect Items
If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery.
Email: support@tophvacparts.com
Phone: (214) 734-5222
We may request photographs and additional information to help process your claim.
If the claim is approved, we will provide a replacement, exchange, or refund at no additional cost to you.
Exchanges
We replace items only if they are defective, damaged upon arrival, or incorrectly shipped.
To request an exchange, contact us at:
Refund Process
Once your return is received and inspected, we will notify you by email regarding approval or rejection of your refund request.
If approved:
- Refunds will be issued to the original payment method.
- Processing typically takes 7–14 business days after approval.
- Your financial institution may require additional time before the refund appears in your account.
Return Shipping
Customers are responsible for return shipping costs unless the return is the result of:
- Our shipping error,
- A defective product,
- A damaged product received upon delivery.
Original shipping charges are non-refundable.
We recommend using a trackable shipping service and purchasing shipping insurance for higher-value items.
Return Address
HVAC Parts & Equipment Depot
1135 E Plano Parkway, Suite 8
Plano, TX 75074
United States
Professional Installation Notice
Many HVAC products require installation by a licensed HVAC professional.
HVAC Parts & Equipment Depot is not responsible for damages resulting from improper installation, misuse, unauthorized modifications, or failure to follow manufacturer instructions.
Special Orders
Special-order products must be picked up within 30 days of purchase unless other arrangements have been approved.
Unclaimed special-order products may be returned to the manufacturer and may be subject to applicable restocking fees.
Contact Us
If you have questions regarding returns, refunds, or exchanges, please contact us:
HVAC Parts & Equipment Depot
Phone: (214) 734-5222
Email: support@tophvacparts.com
Michel & Siso are very knowledgeable and explain everything to where I could understand! Amazing experience! Thank you will always come here for any AC needs. Trustworthy and excellent customer service.

Happy Shouts From Our Thrilled Customers
William Bartlett
Cecil really saved me with troubleshooting tips over the phone. Thought I was going to have to replace the blower motor and ended up only needing a motor run capcitor. Thank you and God bless!
Riley Connolly
Cecil and Fidel were absolutely amazing and so helpful. We were happy they were open on Sunday, but was impressed with their knowledge and willingness to make sure we had everything we needed. If you need parts or service or install, I would recommend.
Cole Meger
Our AC went out during the hottest stretch of summer, and with a one-year-old at home, we were desperate for a quick fix. These guys came through big time — not only did they source the part faster than anyone else in the area, they also walked me through DIY troubleshooting while I waited. Trustworthy, knowledgeable, and run by a solid local family. As someone who owns rental properties nearby, I’ll be sourcing all my HVAC parts from them moving forward. Highly recommend!
Carl T. Droste
Had a power outage last night and during the 100 degree heat today noticed that the AC was not blowing any cold air. Pulled the capacitors to have them checked and also took video of the relay making noise even with the breaker was off. The proprietor and her staff were very friendly and helpful. She had the video analyzed and confirmed something was wrong. She checked one of the capacitors was a little low. Capacitor replacement is the biggest ticket item for HVAC repair. It is hundreds of dollars with the a capacitor only about $20.
Fuzzy Wuzzy
Cecil and his family have been a life saver. I walked in with very little knowledge on parts let alone how to repair my unit. All I had was my brother in FL who knows more than I do and Cecil at HVAC Depot. With 2 young kids at home I couldn't afford to wait for a HVAC tech. Cecil walked me through what I needed to know, even after hours when the shop closed. I successfully repaired the fan motor and replaced the capacitor. Thank you HVAC team for being totally awesome. Prices were amazing and I'm forever going to support this small family business. You and your family are what Texas is all about!!!
Linda Robinson
I called HVAC Depot and was absolutely blown away by the fast, courteous and exceptional service. They were very knowledgeable about explaining what they were doing and what had happened to the ac system. If you ever need a HVAC team they are best and they won’t hesitate by coming out and they won’t leave until you are happy with the service. Thank you so much for your excellent service. Kudos to you Michelle for your amazing customer service.
Paul Hamer
My AC went out in our home on Friday night. I went out and got the capacitor details and took them here first thing Saturday morning. Lady at the counter was friendly and had the capacitor I needed! When I got home, I installed the capacitor and AC is all good!!
Jeff Ledesma
Awesome support and had everything I needed for an older unit! Then helped me out with the DIY!! Air conditioning back up and running at 100%!!
Thanks for everything
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HVAC Parts and Equipment Depot
Frequently Asked Questions
Questions? We’ve got you covered
We are open to the public! Homeowners, landlords, and DIYers are all welcome—no license required.
We carry blower motors, fan motors, capacitors, control boards, contactors, thermostats, filters, copper lines, refrigerants, and more.
Yes, we stock OEM and compatible replacement parts for major brands including Trane, Goodman, Lennox, Carrier, Rheem, and others.
Absolutely! Bring in the part, model number, or a picture, and our team will help match you with the correct replacement.
Yes, we accept returns or exchanges within a set time period—just make sure the item is unused and in original packaging. Ask for specific terms at the counter.
While we don't install, we can answer basic questions and refer you to trusted local HVAC technicians if needed.
We sell certain refrigerants, but EPA regulations require certification for purchase of products like R-410A or R-22.
We offer both! You can shop in person or call to arrange shipping if you're out of town.