Will Freeze Spray Temporarily Lower The ESR Value?
Assuming if you do not have ESR meter, how do you spot a bad electrolytic capacitor in electronic circuit? You knew that, using digital capacitance meter to check electrolytic capacitor will not give an accurate answer because, for a bad capacitor, the meter would show that the bad cap is good even though the ESR value already shot up many times. What if you have a can of FREEZE spray (Coolant) in your workshop. Will the Freeze spray detect bad capacitors (high ESR value) in electronic circuit?
The answer is no- because i had tested many bad filter capacitors that have high ESR value, the ESR meter reading don’t show any changes (turn to lower ESR value) at all. It other words, the bad caps ESR value does not show any respond when the Coolant was used to spray on the bad capacitors. However, if the capacitor have intermittent problem (due to heat and cold), Coolant is the best to find out the intermittent fault.
If you do not have any ESR meter, please get one because you do not know what you are missing as an electronic repairer. I personnally have not heard of anyone in this repair trade that they regret using ESR meter.