A friend asked me to look at their MK5 GHD straighteners which had began chirping. This is when they play the start up sound repeatedly when you switch them on.
This is how I fixed them.
After some initial research it looked like the thermistor might be at fault. This is a component which prevents the heating elements from turning on if they are too cold.
In this case the elements were warming up while the GHDs where chirping so I moved my attention elsewhere. Following some advice I found online, a new CPU was ordered and swapped but this didn’t cure the fault.
GHD Straightener CPU replacement video
Next, I did what I should have done in the very beginning and checked the R8 and R11 resistors. Sure enough the R8 resistor was showing open on my multimeter. Thankfully I had some spares from the last time I repaired my girlfriends GHDs, so I was able to quickly sort out a replacement and fix them successfully.
Replacing the R8 Resistor on the Mark 5 GHD Straighteners
Always start with some basic fault finding. Check for voltages, continuity on the fuses and most importantly, look for the well known failure points on what you are fixing, before you go all gung-ho and start looking for more complicate faults that don’t exist.
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