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Storage Heater B: No Hot Water at All

JOVEN Storage Heater Has No Hot Water? Here’s Exactly What to Check First

First of all, this article is if there is no hot water at all. Meaning to say that, the water is not even slightly warm or heated.

⚡ Quick Answer (Read This First)

If your storage heater has no hot water, the most common reasons are:

  • Heater is not powered on

  • Heater was not fully filled with water before turning on the first time

  • Not enough heating time (Minimum 20–30 mins required depending on size of your heater)

  • External Electrical Issue like Circuit breaker / switch issue which is not related to any components found on your JOVEN water heater

  • Faulty Internal component

👉 Good news: Many cases can be solved in under 2 minutes.

🔍 Step-by-Step Quick Check

✅ Step 1: Check Power Supply

  • Is the heater switch ON?

  • Is the isolator switch working?

👉 No power = no heating

Please get an electrician to have the switch checked as it may be an external electrical fault as the light on the heater should turn on after turning it on for the first time. Otherwise, if the heater switch is working, please wait 6 hours later and try turning on the heater switch again.

✅ Step 2: Wait for Heating Time

Storage heaters are NOT instant and they take some time to heat up the water in the tank.

  • Heating time: minimum 20–30 minutes

  • Larger tanks will take longer

👉 Turn on → wait → test again

Do refer to our chart below for the recommended heating times for the hot water to be fully heated to the maximum temperature

Model

Volume of Tank (Litres)

Time To Heat (Minutes)

JSH 25

25

20

JSH 35

35

30

JSH 38

38

35

JSH 50

50

45

JSH 56

56

50

JSH 68

68

60

JSH 91

91

60

JSV 25

25

20

JSV 35

35

30

JSV 50

50

45

✅ Step 3: Check Circuit Breaker

  • If your heater switch has no light,

  • Has the breaker tripped?

  • Any power outage?

👉 Reset once if needed

✅ Step 4: Test Water Flow

  • Turn on hot water tap

  • Is water flowing normally?

👉 No flow = plumbing issue, not heater

🚨 Common Causes Explained

1. 🔌 Heater Not Switched On

Simple but very common.

👉 Happens after:

  • power trips

  • cleaning

  • switch turned off accidentally

  • dual way switch

2. ⏱ Insufficient Heating Time

Storage heaters heat water inside a tank

👉 If used immediately → water will be cold

3. ⚡ Electrical Supply Issue

  • Incoming Supply is not 230V between Live and Neutral Supply

  • Faulty switch

  • Loose wiring

  • Tripped breaker

4. 🔥 Heating Element Fault

  • Element may be worn out over time

Signs:

  • No heat even after 60 minutes

  • Power is ON but water stays cold

5. 🌡 Thermostat Issue

  • Controls water temperature

If faulty:

  • heater may not activate heating

🛠 Try This Simple Fix (Most Effective)

  1. Turn OFF heater

  2. Wait 5 minutes

  3. Turn ON again

  4. Wait 20–30 minutes

  5. Test hot water

👉 This resets minor electrical issues

🚫 What You SHOULD NOT Do

  • ❌ Do NOT open the heater casing

  • ❌ Do NOT attempt electrical repairs

  • ❌ Do NOT keep switching on/off repeatedly

👉 This can be dangerous and voids warranty

👨‍🔧 When You Should Book a Service

Book a service if:

  • No hot water after 40 minutes

  • Heater switch is ON and with light turned on but heater is not heating

  • Issue keeps happening repeatedly

🧠 Why JOVEN Heaters Are Different

JOVEN heaters use:

  • ✅ Stainless steel tanks

  • ❌ No anode rod required

  • ✅ Less internal corrosion risk

👉 This means better durability, but electrical components still require proper maintenance.

📅 Book a Service (Fast Process)

To speed things up, prepare:

  • 📍Your postal code and address

  • 📸 Photo of heater & label with Serial Number

  • 🧾Purchase Receipt or Warranty Registration

  • 📝 Short issue description (“no hot water at all”)

Do take note of these service conditions before requesting an appointment:

  • Check if your heater has a valid warranty otherwise a prepayment transport fee is chargeable.

  • If we found any external electrical faults, no repairs will be done and there will be a diagnostic fee of $70/$85 (depending on area). We recommend you to approach a certified Licensed Electrical Worker (LEW) to check on your external wiring before contacting us to arrange for an appointment.

Contact Service Support

❓ Frequently Asked Questions

Why is my heater ON but water still cold?

If there is no light on the heater at all after waiting for 24hours before turning on the heater, most likely there is an issue with either the incoming electrical or that there is an internal component malfunction.

How long should I wait?

Typically 20–30 minutes for the water to be just slightly warm

Can I still use the heater?

Yes, but if no heating after waiting for the appropriate time recommendations → service needed

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