Heater blower not working

The blower motor relay is energized when the Blower Motor Control is set to the High position. This removes the blower motor resistors from the circuit and battery voltage is then applied directly from the HVAC BLO fuse (RH IP Accessory Wiring Junction Block) to the blower motor though the relay switch contacts. The blower motor then runs at high speed.

HVAC Blower Controls Circuit Description
The blower motor is a variable speed motor. The motor operates at a higher rate when voltage is increased to the maximum level.
The blower motor resistors reduce the voltage supplied from the A/C FAN fuse (LH IP Accessory Wiring Junction Block) when the blower control is set at low and medium speeds (speeds 1-4). The blower motor relay is energized when the Blower Motor Control is set to the High position. This removes the blower motor resistors from the circuit and battery voltage is then applied directly from the HVAC BLO fuse (RH IP Accessory Wiring Junction Block) to the blower motor though the relay switch contacts. The blower motor then runs at high speed.

Blower Motor Always On
Disconnect the blower motor relay.
Does the blower motor stop running?
YES or NO
2
Disconnect the blower motor relay.
Does the blower motor stop running?
--
YES - Go to Step 4
NO - Go to Step 3
3
Repair the short to the voltage in CKT 65 (PPL) wire.
Is the repair complete?
--
Go to HVAC Blower Controls System Check
--
4
Turn the blower switch to the LOW position.
Connect a test lamp between CKT 52 (ORN) wire and ground.
Does the test lamp light?
--
YES - Go to Step 5
NO - Go to Step 8
5
Inspect for a short to voltage in CKT 52 (ORN) wire.
Is the circuit OK?
--
YES - Go to Step 7
NO - Go to Step 6
6
Repair the short to voltage in CKT 52 (ORN) wire.
Is the repair complete?
--
Go to HVAC Blower Controls System Check
--
7
Replace the heater and A/C controller. Refer to Control Assembly Replacement .
Is the replacement complete?
--
Go to HVAC Blower Controls System Check
--
8
Replace the blower motor relay.
Is the replacement complete?
--
Go to HVAC Blower Controls System Check
--

The rotary control switch on the dash controls the blower motor for the A/C. The A/C will not turn on unless the blower motor is functioning properly. The passenger-side radiator fan will not turn on until the A/C begins running. BUT the driver's side radiator fan should always work. Ergo, check the function of the blower motor (located underneath the dash behind the glove box). Usually when it goes bad, it's because of the blower motor RESISTOR (mounted inside the blower motor housing). When the resistor goes bad, the blower motor shorts out, causing it to fail. The switch rarely ever fails. The radiator fan relays are located next to & on both ends of the radiator. Check them too. In the link, the blower motor RESISTOR is #5.
Acura Parts AcuraOEMparts com Genuine Acura OEM Parts from Delray Acura

Yes both relay and switch are possible.Needs to be inspected.
Blower motor replacing for all vehicles? http://repairhelpcenter.blogspot.in/2012/02/blower-motor-replacing-for-all-vehicles.html

Blower motor Resistor shorting problem?

http://schematicsdiagram.blogspot.com/2011/12/blower-motor-resistor-shorting-problem.html

How to remove Blower control switch? http://howtobyme.blogspot.in/2012/02/how-to-remove-blower-control-switch-on.html

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Where is blower motor relay located ? http://technoanswers.blogspot.in/2012/02/where-is-blower-motor-relay-located-on.html

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This will help.Thanks.

Ok i could be 1 of 3 things blower relay,blower switch or blower motor resistor.First thing to do is check the blower motor resistor by pulling on and wiggling the pigtail to the resistor with the ignition and fan switches on.Then if there is no bad connection i would replace the relay and if no change afterwards replace the fan switch.

CHECK BLOWER MOTOR RELAY ALSO, AND USE A TEST LIGHT TO SEE IF POWER GOING TO BLOWER MOTOR, IF YES BLOWER MOTOR FAULTY.IF NO POWER GOING TO BLOWER MOTOR AND FUSE AND RELAY OKAY CONTROL SWITCH COULD BE BAD,A RESISTOR BAD MOST OF THE TIME IF YOU DONT HAVE BUT A FEW FAN BLOWER CONTROL SPEEDS.

The blend door may not be working properly. It is actuated by a vacuum motor.

or the following part may be bad:

Blower Motor Control Module Removal & Installation To Remove:

1. Remove the insulator from the right side of the instrument panel.
2. Disconnect the connectors from the blower motor resistor and blower motor.
3. Loosen the two forward screws and remove the rear screw of the resistor assembly.
4. Remove the blower motor resistor assembly.

To Install:
Install the blower motor resistor assembly. Install the rear screw and tighten the forward screws. Connect the electrical connectors to the blower motor and resistor assembly. Install the insulator under the right side of the instrument panel.

the last year, your blower resistor has been bad, now your motor is bad. rap on the motor and see if it start to run, if so, replace the motor and the resistor.

Blower motor resistor is most common ($20-$70) it controls the blower motor fan and speeds or fan relay fuse (usually under the hood) If it's not either then the blower itself is bad. You can pull the motor and apply 12volts to it to test, if it spins then the resistor.

Check for a blown heater motor supply fuse,
Check operation of heater motor control relay,
Check operation of fan speed control switch,
Check heater motor speed control resistor pack (usually located in the heater ducting - in the air flow),
Check the heater motor runs if power directly applied to the motor- if not motor may be faulty.