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Old 09-01-2014, 06:27 PM   #1
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coil clean


On basic heat pump systems when you have a service call for regular maintinence should the unit coils be cleaned before or after the testing of the unit?

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Old 09-01-2014, 06:53 PM   #2
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coil clean


I inspect the indoor one if it is accessible. If the outdoor one is very dirty I wash it and then check the unit. If not so dirty I start it and do a basic check. Then I wash it and recheck. If it is cold outside/ below 70F you have to be careful as a wet coil will give false discharge pressures etc. Takes forever to dry properly. That is why getting some basic readings first helps.

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