Triton T90XR & Safeguard Pump Motor Testing: Fix Low Pressure & Tripping Faults

⚠️ SAFETY FIRST: READ BEFORE STARTING

Working on electric showers is dangerous. You are dealing with a high-voltage appliance (240V) and water.

• ISOLATE POWER: Always turn off the electricity at the main consumer unit (fuse box) and pull the isolation cord before removing the shower cover.

• VERIFY DEAD: Use a voltage tester to ensure no power is reaching the unit.

• LEGALS: In the UK, major electrical work in bathrooms is "Part P" regulated. If you are not a competent person or are unsure of these tests, stop and consult a Part P qualified electrician.

• DISCLAIMER: You follow these guides at your own risk. This site and its authors are not liable for any injury, loss, or damage caused by your repairs.

These motor are AC universal brushed motors to test just test the windings both sides after disconnecting brushes ( check brush length while you do this and replace if needed ).

On this model the brushes connect via retaining spring so i disconnected this to isolate the windings for testing , test with meter set to ohms and measure, I read roughly 18 ohms each side.

Next check the rotor over for signs of damage and burn or overheating signs or even smells , then test from segment to segment all around the commutator until every pair have been tested, they should all be very similar readings.

You can then dismantle the the pump from the motor to inspect it for internal damage.

Buy electric shower parts on Ebay UK here

Need a Multimeter for testing try on Ebay UK here

Hook back the brush springs this will remove electrical contact from brushes good time to check or replace the brushes , these are good so no need 

Here i test both winding one each side the reading should be very similar here they are exact so very good winding on this motor

above you can see the segments of the commutator on the rotor

you need to test the ohms value between  segment and the next one to it above is 6.2 the next 4.3 this could be a bad sign or just a dirty commutator so clean it off first with some contact cleaner and even wire wool

Now do this to every next pair of segments all round the commutator 

if motor checks out you now can visually inspect the pump on the motor 

check internal impellers 

This is the bleed nipple for bleeding the pump when commissioning 

See video of this process below 

And video below shows insulation resistance testing or PAT testing on motor which was tripping the electricity supply.

Insulation resistance testing requires a dedicated PAT tester or Megger; a standard $10 multimeter is not sufficient for high-voltage leakage tests.

above shows 120 Mohm a good enough reading but below is less than 1 Mohm so dangerous 

Advanced Motor Diagnostics

1. Winding Test: Disconnect the brush springs to isolate the windings. A healthy Triton Safeguard motor should read approximately 18 Ohms on each side. If one side is significantly different, the motor is unbalanced and will fail.

2. Commutator Segment Test: Clean the copper commutator with contact cleaner or wire wool first. Test the Ohms between every adjacent pair of segments.

   • Good Signal: Consistent readings (e.g., all around 4 ohms - 6 ohms).

   • Fail Signal: A sudden jump (e.g., 6.2 ohms to 10 ohms) suggests a partial short or a broken winding.

3. Insulation Resistance (PAT Test): If your shower is tripping the RCD/Fuse:

   • Pass: 100M ohms Shown in my video as 120M ohms

   • Fail: <1 Mohm This is dangerous and indicates current is leaking to the earth through the motor housing. The motor must be replaced.

Video Description:

Is your Triton T90XR or Safeguard shower struggling with low water pressure, making a strange "grunting" noise, or tripping your electricity? In this technical walkthrough, we go deep into the internal pump motor—the heart of these gravity-fed units—to show you how to diagnose a failing motor versus a simple part replacement.

⚠️ CRITICAL SAFETY WARNING:

Electric showers are high-voltage appliances (240V) combined with water. Always isolate the power at the main consumer unit (fuse box) and the pull-cord before removing the cover. Verify the unit is "dead" with a voltage tester. If you are not a competent person, please consult a Part P qualified electrician.

In this video, we cover:

• Motor Winding Tests: How to isolate and measure the AC universal brushed motor. 

• Commutator Segment Analysis: Step-by-step segment-to-segment Ohm testing to find internal shorts or burnt-out rotors.

• Carbon Brush Inspection: Why worn brushes are the #1 cause of intermittent low pressure.

• Insulation Resistance (PAT Testing): We use a Megger to show why your shower might be tripping the RCD/MCB (

• Pump Priming & Bleeding: The essential "Bleed Screw" technique to prevent "dry-start" damage after a repair.

Timestamps: 0:00 – Safe Teardown & Component Overview 1:30 – Testing Motor Windings  3:15 – Commutator & Rotor Diagnostic 5:40 – Checking Carbon Brush Wear 8:10 – Insulation Resistance / Tripping Fault Test 10:20 – Reassembly & Pump Priming