Bosch LV009 User Manual (English)

Questions and Answers:

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vgatesAug 17, 2025
Why is my Bosch LV009 Heat Pump not shifting into cooling?
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  torresbrianAug 17, 2025
  If your Bosch Heat Pump isn't shifting into cooling mode, check that the reversing valve solenoid is receiving 24 VAC. If it is, check the resistance of the solenoid; an open circuit may indicate a burned out solenoid. Also, check that the reversing valve thermostat wire is connected to the 'O' terminal of the thermostat and check for a contact closure between 'O' and 'R'. Finally, check that the wires from the thermostat to the unit are securely connected and that the wires from the electrical box to the reversing valve are connected.
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ssimmonsAug 19, 2025
How to reduce objectionable noise levels from my Bosch LV009?
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  lindsay12Aug 20, 2025
  If you're experiencing objectionable noise levels from your Bosch Heat Pump, ensure the duct work and grilles are properly sized for unit air flow. If the fan speed setting is too high, consult the blower performance table and reduce fan speed if possible. To address structure borne noise, mount the unit on a vibration pad. Also, install the unit in accordance with the provided instructions and adjust the unit location to prevent it from touching the structure.
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David SloanAug 22, 2025
Why is my Bosch LV009 Heat Pump causing high humidity?
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  Thomas RiveraAug 22, 2025
  If your Bosch Heat Pump exhibits high humidity, several factors could be the cause. First, high air flow may be the problem; in this case, consult the blower performance table and reduce fan speed if possible. Second, there might be a loss of refrigeration capacity, so check refrigerant pressures with a gauge set. Third, short cycling could be the reason; check unit performance against building load calculations. Finally, a poorly located thermostat can contribute to high humidity; ensure that the thermostat is not located near a supply air duct.
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brian24Aug 26, 2025
What to do if the compressor is not working but the fan runs on my Bosch LV009, and it might be related to low pressure?
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  Monica SmithAug 26, 2025
  If your Bosch Heat Pump compressor isn't working but the fan is running, a low-pressure fault may be the cause. Make sure that the fan motor is operating properly. Check the air filter, inspect the air coil for dirt/debris, and check the duct work to ensure dampers are not closed or blocked. Also, low refrigerant could be the cause, so check the refrigerant pressure with a gauge set.
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Benjamin YoungAug 28, 2025
What to do if the compressor is not working but the fan runs on my Bosch LV009, and it might be related to a freeze fault?
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  April HoganAug 28, 2025
  If the compressor of your Bosch Heat Pump isn't working, but the fan is still running, it might be due to a freeze fault in the water coil. This could be caused by no or low water flow, so check the water valves and/or pumps for proper operation and inspect the water coil for blockages. Another cause might be low water temperature; check if the water temperature is below 40° entering. If the heat pump is connected to a closed loop with antifreeze, check that the 'FREEZE 1' resistor on the UPM board has been cut to set the unit to antifreeze mode. Also, low refrigerant may be the cause, so check refrigerant pressure with gauge set.
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James JuarezAug 30, 2025
What to do if the compressor is not working but the fan runs on my Bosch LV009, and it might be related to condensate?
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  Mr. Michael NewtonAug 30, 2025
  If the compressor of your Bosch Heat Pump isn't working, but the fan is still running, a condensate fault could be the cause. This may be due to poor drainage, so check the condensate pan for a high water level and inspect the drain line for blockages, double trapping, or inadequate trapping. Another cause may be blocked return air, so check the condensate pan for a high water level, check the air filter and return air duct work for blockage, and ensure adequate space between the return air opening and any obstructions.
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Barbara ShepherdSep 2, 2025
What to do if the compressor is not working but the fan runs on my Bosch LV009 Heat Pump, and it might be related to a brown out fault?
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  Joshua BrownSep 2, 2025
  If the compressor of your Bosch Heat Pump isn't working, but the fan is still running, it could be due to a brown out fault. This could be caused by low supply voltage, so check the primary voltage to ensure it is within the limits listed on the unit data plate. Another cause may be an overloaded control circuit; if the control voltage is below 18 V, check accessories connected to the unit and ensure that they do not exceed the VA draw. A bad thermostat connection can also cause this issue, so check that the thermostat wiring is the proper gauge and length, that it is not damaged, and that all connections at the thermostat and heat pump are secure.
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Kathleen LynchSep 5, 2025
What to do if the compressor is not working but the fan runs on my Bosch LV009, and it might be related to thermostat?
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  Paige AlvarezSep 5, 2025
  If the compressor of your Bosch Heat Pump isn't working, but the fan is still running, ensure that the thermostat is on and calling for 'Y'. Check the 'Y' connection from the thermostat, ensuring that there is 24 VAC between 'Y' and 'C'. Also, check the wiring to ensure that there is 24 VAC across the contactor coil. Finally, test the contactor with 24VAC (between 'R' and 'C'). Ohm the contactor coil; an open circuit indicates a burned coil.
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Miguel GardnerSep 8, 2025
What to do if the fan is not working on my Bosch LV009 Heat Pump with a PSC motor?
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  Kaylee SimonSep 8, 2025
  If the fan on your Bosch Heat Pump isn't working (PSC motor), first check the supply voltage from the fan relay to the motor and ensure that all motor wires are secure. With the power off, spin the motor shaft; noise, resistance, or uneven motion can indicate motor failure. Also, check for 24 VAC across the fan relay coil and check all wiring connections. If the relay coil is energized but the relay does not pull in, check the resistance across the relay coil; an open circuit indicates a faulty relay.
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James Wilson PhDSep 12, 2025
What to do if the fan is not working on my Bosch LV009 with a constant torque motor?
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  Sharon MccoySep 12, 2025
  If the fan on your Bosch Heat Pump isn't working (constant torque motor), check for 24 VAC between 'G' and 'C', and inspect all wiring connections. Also, check all wiring connections at the motor and control box. Check the supply voltage to the motor and ensure that all motor wires are secure. With the power off, spin the motor shaft; noise, resistance, or uneven motion can indicate motor failure.

Bosch LV009 Specifications

General

Model Number	LV009
Heating Capacity	9, 000 BTU/h
Cooling Capacity	9, 000 BTU/h
Refrigerant	R410A
Operating Temperature (Heating)	-13°F to 75°F
Power Supply	208-230V, 1 Phase, 60 Hz
Indoor Unit Dimensions (H x W x D)	8.3 inches
Outdoor Unit Dimensions (H x W x D)	21.3"