Heater fan <em>Nissan Almera G15</em> with air conditioning: breakdowns, diagnostics and repair

Owners Nissan Almera G15 With the climate system, they often encounter problems with the heater fan - from weak airflow to complete failure. This topic is especially relevant for cars with air conditioning, where the fan works in conjunction with a compressor and evaporator. Unlike the basic versions without climate control, the electrical circuit here is more complex, and diagnostics require taking into account additional components.

In this article we will analyze Typical heater fan malfunctions on Almera G15 (2012–2019), including models with air conditioning and climate control. You will learn how to check the motor, resistor, fuses and relays yourself, and also when replacement is necessary. Let us dwell separately on difference in design for versions with manual climate control and automatic system - this affects the repair algorithm.

The material is based on the experience of service technicians and analysis of owner forums Nissan. All instructions are adapted for beginners, but taking into account nuances that are often silent about in general manuals. For example, why the 4th speed may not work after replacing the fan or how to avoid mistakes when disassembling the panel.

The design of the heating and ventilation system Almera G15 with air conditioning

On Nissan Almera G15 with air conditioning, the stove fan is integrated into a single unit of the climate system, which includes:

• 🔹 Fan motor (motor) - located under the glove compartment, to the right of the passenger’s feet. On versions with air conditioning it is more powerful than in basic versions.
• 🔹 Speed resistor — is responsible for adjusting the speed (speeds 1–3). 4th speed goes directly through the relay.
• 🔹 Climate control unit - in versions with manual control these are mechanical rods, in automatic ones (climate control) - an electronic module.
• 🔹 Air conditioner evaporator — located in front of the stove radiator, requires regular cleaning to prevent clogging of the fan.

The key difference from versions without air conditioning is the presence additional relay (usually K37 or K38 in the fuse box) which controls the fan operation at maximum speed. The system also has freon pressure sensor, which can block the fan from turning on if there is a refrigerant leak.

Fan connection diagram Almera G15 with air conditioning:

element	Location	Purpose
fuse F30 (30A)	Fuse box in the passenger compartment (under the steering wheel)	Fan circuit protection
Relay K37	Same block	4th speed control
Speed resistor	Under the glove compartment, next to the engine	Adjustable 1-3 speeds
Evaporator temperature sensor	Behind the glove compartment, on the air conditioning pipe	Blocks the fan when frozen

⚠️ Attention: On Almera G15 2016–2019 with climate control, the fan control unit is integrated into the climate panel. When replacing it, it is required flashing via a diagnostic scanner (for example, Launch X431), otherwise the speeds will not work correctly.

Signs of a malfunctioning stove fan

Problems with the fan on Almera G15 manifest themselves differently depending on the cause. Here are the typical symptoms:

• 🚫 The fan does not turn on at any speed - most often the fault is a fuse, relay or power failure.
• 🔄 Only 4th speed works - a classic sign of a faulty resistor.
• 🌀 Noise, grinding or vibration — wear of the motor bearings or debris (leaves, dust) getting into the impeller.
• 🌬️ Weak airflow at 1–3 speeds — oxidation of resistor contacts or clogged cabin filter.
• ❄️ The fan turns off when the air conditioner is turned on — freon pressure sensor or relay is faulty K37.

The situation is especially insidious when the fan works every other time. This may be caused by:

• 🔌 Poor contact in the motor connector (oxidation or burning).
• 🔋 Discharged battery - when the voltage drops below 11.5V the control unit turns off the fan.
• 🧊 Freezing of the air conditioner evaporator - the temperature sensor blocks the airflow.

On Almera G15 2018–2019 There is a common error with climate control P0530 (A/C pressure sensor circuit malfunction), which indirectly turns off the fan. Diagnosed only with a scanner!

Diagnostics of the stove fan: step-by-step instructions

Before disassembling the panel, check simple things:

1. fuse F30 (30A) — located in the fuse box under the steering wheel. If it burns out, replace it with a similar one (do not install a bug!).
2. Relay K37 — responsible for 4th speed. Swap with a similar relay (eg K38 for radiator fan) and check operation.
3. Cabin filter - if it is clogged, air does not flow even with a working fan. Located behind the glove compartment.

If the fuses and relays are OK, proceed to in-depth diagnostics:

1. Check fuse F30 (30A) and relay K37

2. Inspect the motor connector for oxidation

3. Test the speed resistor with a multimeter

4. Check the voltage on the motor (should be 12V at 4th speed)

5. Make sure the cabin filter is clean -->

Continuity of the speed resistor:

1. Remove the connector from the resistor (located next to the motor).
2. Ring the resistance between the contacts:
   • Speed 1–2: ~1–2 Ohm
   • 2–3 speed: ~0.5–1 Ohm

If there is no resistance or is very different, the resistor is faulty.

Checking the motor:

1. Disconnect the power connector from the fan.
2. Connect the motor directly to the battery (+12V And mass). If it works, the problem is in the control circuit.
3. If it doesn’t spin, check the brushes and bearings (they often wear out after 100 thousand km).

⚠️ Attention: On Almera G15 with climate control, when the motor connector is disconnected, the calibration of the dampers may be reset. After repair, perform reset climate settings via the on-board computer menu: Settings → Climate → Reset.

Replacing the stove fan: nuances for versions with air conditioning

On Almera G15 with air conditioning, replacing the fan is more difficult than on basic versions due to integration with the evaporator. You will need:

• 🔧 Screwdriver T20 And T25 (for fastening the panel).
• 🔧 Key on 10 (for motor bracket).
• 🔧 Sealant for sealing (for example, ABRO 999) - when assembling, you need to seal the joints so that the cold does not blow.

Step by step instructions:

1. Remove the glove compartment:
   • Unscrew 3 screws T20 below.
   • Disconnect the backlight connector.
   • Carefully remove the glove compartment without damaging the air ducts.
2. Remove the cabin filter:
   • Release the filter cover latches.
   • Remove the filter (when replacing the fan, it is better to change it at the same time).
3. Disconnect the connectors:
   • Remove the connector from the motor (black, 2 contacts).
   • Disconnect the resistor connector (white, 4 pins).
4. Unscrew the motor:
   • Remove 3 bolts 10 mm fastenings
   • Carefully pull out the fan by turning it counterclockwise (the latches may be tight).

When installing a new fan:

• 🔹 Check it out connection polarity - if you mix it up + And –, the motor will blow in the opposite direction.
• 🔹 Apply sealant to the junction of the fan housing and the body to prevent cold air from suction.
• 🔹 After assembly, do damper calibration (for climate control): turn on the ignition, press and hold the button AUTO 10 seconds.

What happens if you don't seal the joints?

If the seal between the fan and the body is poor, unfiltered air from the street will enter the cabin, and a whistle will also appear at high blowing speeds. In addition, the air conditioner will work less efficiently due to the suction of warm air.

Cost of work in the service:

Service	Price (RUB)	Time (hour)
Fan diagnostics	800–1 200	0.5–1
Replacing the motor (without air conditioning)	2 500–3 500	1.5–2
Replacing the motor (with air conditioning)	3 500–5 000	2.5–3
Replacing the speed resistor	1 200–1 800	1

Selection of spare parts: original vs analogues

For Nissan Almera G15 with air conditioning, the original heater fan has an article number 27310-4M000 (for versions with manual climate control) or 27310-4M001 (for climate control). Average price - 4,500–6,000 rub. at official dealers. However, there are high-quality analogues:

Manufacturer	Article	Price (RUB)	Notes
Nipparts	J1301055	2 800–3 200	Good price/quality ratio, suitable for versions with air conditioning.
Blue Print	ADN12001	3 500–4 000	Long service life, but may make noise for the first 100 km.
Valeo	698733	4 200–4 800	Original supplier for Nissan, the best analogue.
Febi	30336	2 500–3 000	A budget option, but it often breaks down after 1–2 years.

When choosing, please note:

• 🔹 For versions with climate control Only fans with a 5-pin connector are suitable (manual versions have 3 pins).
• 🔹 Must be included in the kit o-ring — without it there will be an air leak.
• 🔹 Check it out direction of rotation (there is an arrow on the body). For Almera G15 — clockwise (when viewed from the impeller side).

Cleaning the air conditioner evaporator: why is it important for the fan

On Almera G15 With air conditioning, the stove fan works in conjunction with the evaporator. If the evaporator is clogged with dust or mold, this will lead to:

• 🦠 The smell of dampness in the cabin - bacteria multiply on the damp surface of the evaporator.
• 🌀 Reduced air flow — the fan cannot clear clogged honeycombs.
• ❄️ Evaporator freezing — the temperature sensor turns off the fan.

How to clean the evaporator without removing it:

1. Remove the cabin filter (see instructions above).
2. Spray cleaner (eg Liqui Moly Klima-Anlagen-Reiniger) into the air duct in front of the evaporator.
3. Turn on the fan at maximum speed for 10 minutes.
4. Repeat the procedure 2-3 times.

For deep cleaning, you will need to remove the evaporator, which is difficult without experience. This service costs 3,000–5,000 rub..

Common repair mistakes and how to avoid them

Even experienced car owners make mistakes when repairing the heater fan. Here are the most common:

• 🔌 Reversed polarity — if you connect the motor incorrectly, it will blow in the opposite direction (cold air instead of hot).
• 🔧 Leaky joints — without sealant between the fan and the body, whistling and drafts will appear.
• 🔋 Ignoring calibration — after replacing the fan on versions with climate control, you need to reset the damper settings.
• 🧹 Forgetting to clean the cabin filter — the new fan will quickly clog if the filter is dirty.

How to avoid problems:

• 🔹 Before disassembling take a photo of the location of the connectors - this will help not to confuse them during assembly.
• 🔹 Use dielectric grease (For example, CRC 2-26) for resistor contacts - this will prevent oxidation.
• 🔹 After replacement, check the operation of the fan for all speeds, including recirculation mode.

⚠️ Attention: On Almera G15 2018–2019 an error may appear when replacing the fan B1420 (fan control circuit malfunction). It can only be reset by a diagnostic scanner (for example, Launch CReader).

FAQ: Frequently asked questions about the stove fan Nissan Almera G15

Why does the heater fan only work at speed 4?

This is a typical sign of a problem speed resistor. At speed 4, the current goes directly through the relay, bypassing the resistor. Replace the resistor (part no. 27350-4M000), cost - about 1,500 rubles.

Is it possible to drive without a cabin filter if it is clogged?

Strongly not recommended! Without a filter, the fan will draw in unfiltered air containing dust and leaves, resulting in motor jamming or clogged air conditioner evaporator. The maximum is to temporarily remove the filter for diagnostics, but no more than 1–2 days.

How to check if the fan motor is working without removing it?

Connect to its connector +12V directly from the battery (minus to the case). If it works, the problem is in the control circuit (fuse, relay, resistor). If not, the motor is faulty.

Why does cold air blow after replacing the fan?

You probably reversed the polarity of the connection - the motor rotates in the opposite direction. Also check stove damper: on Almera G15 it may get lost during disassembly. To reset, perform calibration (see instructions above).

How much does it cost to replace a stove fan at an official service center? Nissan?

In dealership centers the price for work is 5,000–7,000 rub. (excluding spare parts). With the original fan, the total cost will be 10,000–12,000 rub.. Independent services are cheaper - about 3,500–5,000 rubles. for work.