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Carrier B31 V-Belt
The Carrier B31 is a replacement v-belt for compatible HVAC equipment. This listing retains the equipment-model, alternate-part, and supersession references documented in the existing product record.
Product Details
- Manufacturer: Carrier
- Manufacturer Part Number: B31
- Part Type: V-Belt
Compatibility
No exact equipment-model cross-reference was present in the existing catalog record. Confirm compatibility using the complete equipment model and serial number plus the original part number.
Before Ordering
HVAC parts can vary by equipment series, production date, serial number, revision, dimensions, connectors, and electrical or mechanical specifications. Confirm the complete equipment model and serial number, the original part number, supersession history, and all relevant installation requirements. Installation and diagnosis should be performed by a qualified HVAC service professional.
Features:
- For use with KC and KH blades
- The H bushings are for 24"-48" blades
Specifications
- Dimension (In.) K 21/32
- Dimension (In.) L 1-7/8
- Dimension (In.) O.D. 3.75
- 3L Belts Max. Pitch 3.1
- 3L Belts Min. Pitch 2.3
- 3L Belts Turns Open 0
- 4L or A Belts Max. Datum 3.4
- 4L or A Belts Min. Datum 2.4
- 4L or A Belts Turns Open 0
- 5L or B Belts Max. Datum 3.7
- 5L or B Belts Min. Datum 2.7
- 5L or B Belts Min. Turns Open 6
- Outside Diameter (In.) 3.75
- Dimension (In.) F Max. 1-1/16
- Dimension (In.) F Min. 11/16
- Dimension (In.) G Max. 7/8
- Dimension (In.) G Min. 1/2
- Stock Bore (In.) 1/2
- 3L Belts Min. Turns Open 4
- 3L Belts Max. Turns Open 0
- 4L or A Belts Min. Turns Open 5
- 4L or A Belts Max. Turns Open 0
- 5L or B Belts Max. Turns Open 1
- Pulley Type 1
Maintenance & Troubleshooting:
- Pressure switches are commonly replaced when a furnace or HVAC system will not complete its startup sequence due to pressure/airflow proving issues.
- Customer feedback commonly associates replacement with resolving a "pressure switch" fault condition and restoring normal operation.
- The provided sources do not include diagnostic procedures; follow the equipment documentation for troubleshooting steps and verification before replacement.
User Reviews & Q&A Summary:
- Review themes indicate the part is commonly described as an exact fit and used as a direct replacement to get a furnace running again.
- Several reviews mention the unit returned to normal operation after installation, including clearing a fault condition related to the pressure switch.
- Additional feedback highlights ease of ordering and timely delivery, and notes that this part fit where other attempted parts did not.
Certifications & Compliance:
- Rheem includes a California Proposition 65 warning for this pressure switch kit on its parts listing
- No other separate certifications or listings are explicitly stated for this part in the provided sources
User Reviews & Q&A Summary:
- Common review themes: direct-fit replacement that fixes "no heat" situations and gets the furnace running again, often described as an easy swap once accessed
- Several reviewers note this is an updated version of the original design and may mount differently (users mention included hardware such as a longer screw/spacer to accommodate the revised mounting)
- Q&A themes emphasize that pressure switch ratings/markings are not interchangeable by appearance alone; customers are advised to confirm the correct part by furnace model/serial rather than substituting based on pressure markings
Product Highlights
EPDM
Specs
| Length | 12 inches (in) |
|---|---|
| Width | 3 inches (in) |
| Height | 0.8 inches (in) |
| Weight | 0.24 pounds (lbs) |
| Attributes | |
| Belt Industry Code | B26 |
| Belt Length | 29 |
| Belt Style | B |
| Belt Thickness | 2/5" |
| Belt Type | Standard V-Belt |
| Belt Width | 21/32" (16.670mm) |
| Brand | TOTALINE® |
| Country of Origin | IDN |
| Cubic Measurement | 0.0167 |
| Dimensional Weight | 1 |
| GTIN | 00662441003936 |
| Prop 65 | NO |
| UPC | 662441003936 |
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Reviews
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