Nissan Almera G15 heater resistor: why the fan doesn’t work and how to change it

Owners Nissan Almera G15 (2013–2019) often encounter a problem when the stove stops blowing at speeds 1–3, leaving only the maximum mode to work. The culprit in 90% of such cases is heater fan resistor, which eventually fails due to overheating or corrosion. This part is inexpensive, but replacing it requires care and knowledge of the nuances of disassembling the panel.

Unlike a breakdown of the heater motor or fuse, a faulty resistor manifests itself characteristic “click” when changing gears - this relay is trying to supply voltage to the burnt tracks. If you ignore the problem, you may experience complete fan failure or even a short circuit in the circuit. In this article we will look at how to accurately diagnose a breakdown, where the resistor is located in Almera G15, and how to replace it yourself without contacting service.

Signs of a malfunctioning heater resistor

Heater resistor in Nissan Almera G15 is responsible for adjusting the fan rotation speed. When it breaks, the symptoms appear clearly and unambiguously:

• 🔥 The stove fan is working only at 4th speed (maximum), and at 1–3 it is silent.
• 🔊 When switching the speed controller you can hear relay clicks, but no air is blowing.
• 💨 The stove turns on only after several attempts to switch or “shake” the regulator knob.
• 🔋 Fuse F30 (10A) in the cabin unit regularly burns out for no apparent reason.

It is important to distinguish resistor failure from other problems:

• ❌ If the fan doesn't work at all (including 4th speed), the motor or fuse is at fault F30.
• ❌ If the stove is blowing, but the air is cold, check thermostat or antifreeze level.
• ❌ If speeds are switched chaotically, the problem may be panel switch.

⚠️ Attention! If the fuse blows when you turn on the stove F30, do not rush to change it. First, disconnect the resistor connector - if the fuse stops burning, the part definitely needs to be replaced. Installing a fuse of a larger rating will lead to melting of the wiring!

Where is the heater resistor located in Nissan Almera G15

Heater fan resistor in Almera G15 located under the glove compartment, next to the heater motor. To get to it, you don’t need to remove the entire panel - just remove the lower plastic trim under the glove box.

Exact location:

• 📍 Under the glove compartment, closer to the central tunnel.
• 🔌 Suitable for resistor connector with 4–5 wires (depending on the year of manufacture).
• 🔧 Attaches to two screws (sometimes one) and a retainer.

The photo below shows the location of the part (the resistor is circled in red, the heater motor is circled in blue):

Photo of the location of the heater resistor

The image shows that the resistor is located to the right of the fan motor. It is a small plastic box with metal “ribs” for cooling. The connector usually has 4 contacts: two thick (power) and two thin (control).

The part can be accessed in two ways:

1. Through the bottom pad (the fastest method) - remove the plastic under the glove compartment.
2. Through the glove compartment - requires removal of the glove box, but gives more space to work.

How to check a heater resistor with a multimeter

Before purchasing a new part, you should make sure that the problem is in the resistor. For this you will need multimeter (in resistance test mode) and a screwdriver.

Diagnostic procedure:

1. Disable negative battery terminal (required!).
2. Remove the connector from the resistor (press the latch and pull down).
3. Ring the resistor contacts:
   • 🔹Between 1 and 2 contacts (power) resistance should be 0–0.5 Ohm.
   • 🔹Between 3 and 4 contact (management) — from 1 to 5 Ohm (depending on speed).
   • 🔹 If the device shows infinity (break) or 0 Ohm (short circuit) - the resistor burned out.

Also inspect the part visually:

• 🔥 Melted plastic or burnt tracks are a clear sign of a malfunction.
• 💧 Traces corrosion on contacts - often cause poor contact.
• 🔌 Oxidized or bent connector legs - may cause intermittent operation.

⚠️ Attention! If the resistor appears intact, but the stove does not work at speeds 1–3, check fuse F30 And relay K9 in the salon block. Sometimes the problem lies in the oxidized contacts of the connector, and not in the part itself.

How to replace the heater resistor on a Nissan Almera G15 with your own hands

Replacing a resistor is a simple procedure, but requires care. Everything can be done in 30–40 minutes, having at hand:

• 🔧 Screwdriver T20 (TORX) or cross (depending on the year of manufacture).
• 🔌 Flat screwdriver for removing clips.
• 🔋 New resistor (original or analogue).
• 🧴 WD-40 or silicone grease for contacts.

Step by step instructions:

Process details:

1. Removing the cover:
   • Open the glove compartment and remove all items from it.
   • Push the sides of the glove compartment to release the latches and lower it down.
   • Look under the glove compartment plastic cover (held on by 2 clips and 1 screw). Carefully pry it up with a screwdriver and remove it.
2. Removing the resistor:
   • Disconnect the connector by pressing the latch.
   • Unscrew 2 screws TORX T20 (or crosses, if the car is early).
   • Pull the resistor out of its seat.
3. Installing a new one:
   • Clean the connector contacts from oxidation (you can use alcohol or WD-40).
   • Install the new resistor and secure with self-tapping screws.
   • Connect the connector and check the operation of the stove at all speeds.

If after replacing the stove still does not work at speeds 1–3, check:

• 🔌 Contacts in the connector - they may have oxidized or bent.
• 🔋 Fuse F30 - could burn out when connected.
• 🔧 Speed switch on the panel - sometimes it also fails.

How much does a heater resistor cost on Almera G15 and where to buy

Heater resistor price for Nissan Almera G15 depends on the type of part (original or analogue) and place of purchase. Below is a table with current offers:

Part type	Catalog number	Price, ₽	Where to buy
Original (Nissan)	27440-JM00A (5 contacts)	1 800–2 500	Official dealers, Exist.ru
Original (Nissan)	27440-BM400 (4 pins)	1 500–2 200	Exist.ru, AutoDoc
Analogue (Sasic)	4020030	800–1 200	Auto analysis, AliExpress
Analogue (Blue Print)	ADG02403	1 000–1 400	Emex, AutoSpetsTsentr
Used (from parsing)	—	300–800	Avito, local showdowns

When choosing an analogue, pay attention to:

• 🔌 Number of contacts (4 or 5).
• 📏 Case dimensions - it must fit exactly into the seat.
• 🔧 Complete set — some analogues come without mounting screws.

If you buy a used part, check it with a multimeter before installation — faulty resistors are often sold at dismantling shops.

Common mistakes when replacing a heater resistor

Even something as simple as replacing a resistor can lead to new problems if mistakes are made. Here are the most common of them:

• ⚡ The battery was not disconnected before operation - this may result in a short circuit or blown fuse.
• 🔧 Used the wrong screw - if you tighten the screw too long, it can damage the plastic housing of the resistor.
• 🔌 The connector contacts were not cleaned - oxidation leads to poor connection and repeated failure of the part.
• 🔄 Polarity reversed when connected - the resistor may burn out immediately after switching on.
• 🚗 Didn't check operation at all speeds — sometimes 1-2 modes do not work due to problems with the switch on the panel.

Another common mistake is buying a cheap analogue without checking. For example, resistors from Sasic or NoName-brands often last less than a year. It’s better to overpay for the original or a proven analogue (Blue Print, Febi).

⚠️ Attention! If after replacing the resistor the stove starts working only at 4th speed, but before that it worked for everyone, check panel switch (25560-JM00A). Its contacts may have oxidized or worn out.

Prevention: how to extend the life of a stove resistor

Heater fan resistor in Almera G15 fails due to overheating, moisture and corrosion. To avoid damage, follow these simple recommendations:

• 💧 Avoid moisture to the resistor. If it is wet under the glove compartment (for example, due to a leak in the heater radiator), dry the area with a hairdryer.
• 🔥 Don't turn the stove on high immediately after starting the engine in winter - let the engine warm up for 1-2 minutes.
• 🔌 Clean your contacts periodically resistor connector from oxidation (once every 1–2 years).
• 🚗 Don't ignore the first signs of trouble — if the stove starts to “fail,” check the resistor before it completely fails.

If in your Almera G15 There has already been a case of a burnt resistor, consider installing it additional relay into the fan power circuit. This will reduce the load on the resistor and extend its service life. Connection diagram:

Connection diagram for additional relay

The relay is installed in the gap of the positive wire going to the resistor. One relay contact is connected to the standard wiring, the second to a new wire with a cross-section of 1.5–2 mm², stretched from fuse F30. This reduces the current load on the resistor and prevents it from overheating.

You can also use silicone grease for connector contacts - it prevents oxidation and improves conductivity.

FAQ: questions and answers about the Almera G15 stove resistor

Is it possible to drive with a faulty heater resistor?

Yes, but it's inconvenient and potentially dangerous. If the stove operates only at speed 4, you will not be able to regulate the air flow, which will lead to fogging of the windows in winter and discomfort in summer. In addition, ignoring the problem can lead to fuse F30 blown or even wiring fire in extreme cases.

Which resistor is better to choose: original or analogue?

Original resistor (27440-JM00A or 27440-BM400) lasts longer, but costs 2 times more than analogues. If your budget is limited, you can take proven analogues:

• Blue Print (ADG02403) - good price/quality ratio.
• Febi (24316) is a reliable German brand.
• Sasic (4020030) is a budget option, but may last less.

Avoid cheap Chinese fakes without a brand - they often burn out after 3-6 months.

Why does the stove not work at speeds 1–3, but the 4th works?

This is a classic symptom of a burnt resistor. The point is that 4th speed is connected directly, bypassing a resistor (via a relay), and speeds 1–3 are regulated through it. If the resistor burns out, then low speeds stop working, but the maximum speed remains.

Is it possible to repair the heater resistor?

Theoretically yes, but in practice it is impractical. The resistor represents set of nichrome tracks with different resistance. If one of them burns out, it is impossible to restore it without special equipment. Temporary repairs (soldering jumpers) can lead to short circuit or improper fan operation. It's better to buy a new part.

How long does it take to replace a resistor?

If you have the tools and experience - 20–40 minutes. Beginners may need up to 1–1.5 hours, since the most difficult stage is removing the plastic trim under the glove compartment (the clips often break). If this is your first time disassembling the panel, watch the video instructions for your year of manufacture in advance. Almera G15.