This asthmatic car tyre pump came in to the workshop with little going for it. The owner had been very close to throwing it away when he came across my website.
This AirMan pump is designed to be plugged in to a car’s cigarette lighter socket and provide quick and convenient car tyre inflation. This one was dead.
On first inspection, the fuse was OK, the switch seemed to work and all connections seemed sound, when tested with a multi-meter.
Off with the cover…
When the motor was removed from the cam driving the piston, the bit that drives the pump, it spun freely when power was applied, using a battery in the workshop.
Seemingly, the centre spindle was protruding far beyond it’s specified reach, causing the pump connection rod to it it during rotation. Why? To be frank, I wasn’t sure. I can only surmise that the vibration and heat had caused the flywheel/ toothed drive to slide outside of specification.
There appeared to be room for a small washer to take up the excess space, so I fitted one I had lying around.
The washer, once fitted, allowed the flywheel/ toothed drive to sit ‘square’ in-line with the pump.
Once resembled, the pump ran freely and was ready to inflate, once more.
Cost of a new pump, circa £20. Cost of the washer, circa 5p.
For those wondering what an ‘inverter’ is, let me give a quick explanation: It allows one to use a mains operated device on the move, using a power supply from a motor-home, car or boat, as an example. An inverter ‘inverts’ a smaller voltage to a larger one, usually for most applications. Most inverters sold turn either 12 or 24VDC to 240VAC or 110VAC.
The owner of this one had accidentally connected the input wires the wrong way around, effectively reversing the polarity. Not good. Upon hearing a little ‘pop’ the owner quickly disconnected the power!
Having never worked on an inverter before, I turned to the manufacturer for advice. Sterling Power (UK) were not able to supply any product information on the phone nor via email and were generally not very helpful at all. They did offer a very reasonable 25% discount on a replacement, but were not able to offer much else to save the one I had in the workshop. Never mind.
Back to the problem. Checking the basics, the ‘accident’ had appeared to knocked-out three 25A soldered PCB fuses. Temporarily by-passing the fuses revealed a working unit, so replacing the defective fuses was a good idea at a very reasonable £1.50.
The fuses are mini-blade 25A automotive fuses. Once removed and the new ones soldered in place, the unit worked once more.
Cost of parts, £1.50, cost of replacement unit, circa £160.00.
GHD hair straighteners are a premium product which retail for a minimum of £100 in the UK. However, over time they suffer from common annoying faults which cause owners to condemn the set they have.
This set of straighteners presented ‘as working’ when first switched on. After warming up, hair straightening temperature was reached within the normal time. However, after 5 minutes of use, the temperature reduced and failed to re-heat in a reasonable time. Leaving the straighteners to cool completely would effectively reset the problem, only for the cycle to repeat again.
GHD faults are well documented on YouTube and the fault turned out to be a faulty thermocouple or thermofuse, which should regulate the temperature and cut power in the event of a fault. They do however wear out and this set of straighteners was no exception.
After dismantling, the thermal fuse was replaced for £2.70. The whole job took half an hour and saved the owner nearly £100 on a replacement.