HYDROTHERM BM-1507 Blower Assembly – For KN-6, KN-10, KN-20
Maintain reliable airflow and system performance with the HYDROTHERM BM-1507 Blower Assembly, designed for use on KN-6, KN-10, and KN-20 systems. This OEM replacement blower restores proper air movement and ensures efficient operation of your Hydrotherm unit.
This part replaces Hydrotherm 58-1838 and is equivalent to Fasco Blower P/N 71430039, providing a direct replacement solution.
✅ Key Features
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✅ Compatible with Hydrotherm KN-6, KN-10, and KN-20 units
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✅ Replaces Hydrotherm 58-1838
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✅ Equivalent to Fasco P/N 71430039
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✅ High-performance Type 43B1 blower, 240V, 180 Hz
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✅ Sealed ball bearing design for long-lasting reliability
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✅ Wire harness maximum length: ~32 in.
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✅ Easy installation with included mounting features and gaskets
📋 Specifications
| Specification | Details |
|---|
| Part Number |
BM-1507 |
| Brand Reference |
Hydrotherm / Fasco |
| Name / Model |
Blower Assembly |
| Voltage |
240V |
| Frequency |
180 Hz |
| Type |
43B1 Blower |
| Full Load Amps |
6.5A |
| RPM |
4200 |
| Thermal Protection |
Class B |
| Bearings |
Sealed Ball Bearing |
| Wire Harness Max Length |
~32 in. |
| Rectangular Gasket Diameter |
3 7/8 in. |
| Bottom Gasket Diameter |
5 13/16 in. |
| Replaces |
Hydrotherm 58-1838 |
| Fasco Equivalent |
71430039 |
| Function |
Air Movement / System Blower |
🔄 Cross Reference Table
| Brand | Reference / Part Number |
|---|
| Hydrotherm |
58-1838 |
| Fasco |
71430039 |
| Replacement / Upgrade |
BM-1507 |
⚠️ Common Symptoms Indicating Replacement
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Reduced or no airflow from system
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Unusual noise or vibration from blower
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Blower fails to start or stops intermittently
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Overheating due to insufficient air movement
❓ Frequently Asked Questions (FAQ)
Q: Will this blower assembly fit my KN-10 unit?
A: Yes, the BM-1507 is compatible with KN-6, KN-10, and KN-20 units.
Q: Does this blower come with gaskets and wiring harness?
A: Yes, it includes mounting gaskets and accommodates a wire harness up to ~32 in.
Q: Is this an OEM replacement?
A: Yes, this is a Hydrotherm OEM replacement equivalent to Fasco 71430039.
Q: What type of bearing does the blower use?
A: It uses a sealed ball bearing for long-lasting reliability.
🛒 Shopping Tips
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Confirm your system model before ordering.
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Inspect wiring and mounting for proper installation.
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Ensure airflow direction matches your unit’s configuration.
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Replace gaskets as needed for proper sealing and efficiency.
