A technical question. While flying with my electric propeller De-Icers on, the ammeter is generally in "the green". On the ground when the "feel test" is done every thing seems to be fine. Some times while in operation the ammeter will go to only about 6 amps (10 is minimum recommended). If I turn the prop heaters off with the overhead switch, and turn them back on again the ammeter goes back up to about 12 amps. Since (quoting from the POH) the timer does not reset itself when the cycle is shut off: therefore, when the timer is re-engaged, cycling starts from the position of previous operation. Where should we start troubleshooting? After the switch is turned off and then back on immediately everything seems to be just fine. Also, has anyone ever used an infared thermometer to check the difference between the boot temperature and the ambient (or prop blade) temperature. Thank you very much.
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