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Pitot Heater: no heat, can’t find fuse or CB

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Off2wildblue

Joined: 18 Apr 2018
Posts: 45

Posted: Fri May 24, 2019 8:14 pm Post subject: Pitot Heater: no heat, can’t find fuse or CB

CJ:



I am not getting any heat to my pitot heater. I turn it on, on the ground and it doesn’t warm up. I see the Volt meter go up about 1/8”. So I think it should be warming up. I don’t know where the CB or fuse is located either. Does anyone have any ideas on trouble shooting and locating the fuse?



Thanks!



SAM

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Rob Rowe

Joined: 10 Jan 2006
Posts: 124
Location: Berkshire, UK

Posted: Fri May 24, 2019 11:42 pm Post subject: Re: Pitot Heater: no heat, can’t find fuse or CB

The following topic link is for a -52, but may assist your fault finding.



http://forums.matronics.com/viewtopic.php?t=16770072



For a -52 ... it could be the (parallel) chronometer heaters are causing the observed voltage change. 



Key check is if the 'pitot heat on' warning light isn't illuminating then the pitot heater is open circuit. 



Suggesting a heater element, or more likely a wiring connection, failure.



Hope this helps.



Rob R.

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