Does anyone know what would cause a condenser ran relay to go bad? I replaced one and a year later its bad again. Nick 7252 Does anyone know what would cause a condenser ran relay to go bad? I replaced one and a year later its bad again. Nick 7252
Nick, More info please. Is it a stock relay or a modern replacement? Stock location, inside the cabin? Stock fan? I don't have any answers but more info might help the electrically smart people come up with the answer? Mike Sent from my iPhone On Jun 29, 2016, at 10:25, nick mcintosh sr <nick.mcintosh.sr@gmail.com> wrote:
Does anyone know what would cause a condenser ran relay to go bad? I replaced one and a year later its bad again. Nick 7252 _______________________________________________
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Does anyone know what would cause a condenser ran relay to go bad? I replaced one and a year later its bad again. Nick 7252 _______________________________________________
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In general the death of a relay is caused by 1) cycling 2) over current So having the relay heavy enough to carry the fan current is needed (I would prefer X2) BUT if it is cycled (on/off) with due to the AC thermostat, it will kill a relay. I haven't thought any at all about this circuit (and possible upgrades) but first look and I am thinking remove the condenser fan from the AC de icing switch. Letting it run all the time the AC is on is first thought. Using a pressure switch on dryer would be investigated (but that is getting more complicated) KISS Joe -----Original Message----- From: DeTomaso [mailto:detomaso-bounces@server.detomasolist.com] On Behalf Of Mike Drew via DeTomaso Sent: Wednesday, June 29, 2016 13:48 PM To: nick mcintosh sr Cc: detomaso@server.detomasolist.com Subject: Re: [DeTomaso] Condenser relay Nick, More info please. Is it a stock relay or a modern replacement? Stock location, inside the cabin? Stock fan? I don't have any answers but more info might help the electrically smart people come up with the answer? Mike Sent from my iPhone On Jun 29, 2016, at 10:25, nick mcintosh sr <nick.mcintosh.sr@gmail.com> wrote: the links above.
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I second Joe's suggestion. I've had relays go bad for both reasons mentioned though not on the Pantera. I have also had one with corrosive leads that caused excessive heat and melted the relay and relay base enough to be noticable and resulted in cycling the compressor until I noticed. (also, not on the Pantera) Rob DuMoulin 904.476.8744 rob@dumoulins.net www.kbsi.co http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58 On Wed, Jun 29, 2016 at 2:05 PM, Joseph F. Byrd, Jr. <byrdjf@embarqmail.com> wrote:
In general the death of a relay is caused by 1) cycling 2) over current
So having the relay heavy enough to carry the fan current is needed (I would prefer X2) BUT if it is cycled (on/off) with due to the AC thermostat, it will kill a relay.
I haven't thought any at all about this circuit (and possible upgrades) but first look and I am thinking remove the condenser fan from the AC de icing switch. Letting it run all the time the AC is on is first thought. Using a pressure switch on dryer would be investigated (but that is getting more complicated) KISS Joe
-----Original Message----- From: DeTomaso [mailto:detomaso-bounces@server.detomasolist.com] On Behalf Of Mike Drew via DeTomaso Sent: Wednesday, June 29, 2016 13:48 PM To: nick mcintosh sr Cc: detomaso@server.detomasolist.com Subject: Re: [DeTomaso] Condenser relay
Nick,
More info please.
Is it a stock relay or a modern replacement?
Stock location, inside the cabin?
Stock fan?
I don't have any answers but more info might help the electrically smart people come up with the answer?
Mike
Sent from my iPhone
On Jun 29, 2016, at 10:25, nick mcintosh sr <nick.mcintosh.sr@gmail.com> wrote:
Does anyone know what would cause a condenser ran relay to go bad? I replaced one and a year later its bad again. Nick 7252 _______________________________________________
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A A Does anyone know what would cause a condenser ran relay to go bad? A A I replaced one and a year later its bad again. A A Nick A A 7252 _______________________________________________
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I second Joe's suggestion. I've had relays go bad for both reasons mentioned though not on the Pantera. I have also had one with corrosive leads that caused excessive heat and melted the relay and relay base enough to be noticable and resulted in cycling the compressor until I noticed. (also, not on the Pantera) Rob DuMoulin 904.476.8744 [1]rob@dumoulins.net [2]www.kbsi.co [3]http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58 On Wed, Jun 29, 2016 at 2:05 PM, Joseph F. Byrd, Jr. <[4]byrdjf@embarqmail.com> wrote: In general the death of a relay is caused by 1) cycling 2) over current So having the relay heavy enough to carry the fan current is needed (I would prefer X2) BUT if it is cycled (on/off) with due to the AC thermostat, it will kill a relay. I haven't thought any at all about this circuit (and possible upgrades) but first look and I am thinking remove the condenser fan from the AC de icing switch.A Letting it run all the time the AC is on is first thought.A Using a pressure switch on dryer would be investigated (but that is getting more complicated) KISS Joe -----Original Message----- From: DeTomaso [mailto:[5]detomaso-bounces@server.detomasolist.com] On Behalf Of Mike Drew via DeTomaso Sent: Wednesday, June 29, 2016 13:48 PM To: nick mcintosh sr Cc: [6]detomaso@server.detomasolist.com Subject: Re: [DeTomaso] Condenser relay Nick, More info please. Is it a stock relay or a modern replacement? Stock location, inside the cabin? Stock fan? I don't have any answers but more info might help the electrically smart people come up with the answer? Mike Sent from my iPhone On Jun 29, 2016, at 10:25, nick mcintosh sr <[7]nick.mcintosh.sr@gmail.com> wrote: the links above.
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any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages. _______________________________________________ Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list [10]DeTomaso@server.detomasolist.com [11]http://server.detomasolist.com/mailman/listinfo/detomaso To manage your subscription (change email address, unsubscribe, etc.) use the links above. Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages. _______________________________________________ Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list [12]DeTomaso@server.detomasolist.com [13]http://server.detomasolist.com/mailman/listinfo/detomaso To manage your subscription (change email address, unsubscribe, etc.) use the links above. Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages. References 1. mailto:rob@dumoulins.net 2. http://www.kbsi.co/ 3. http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58 4. mailto:byrdjf@embarqmail.com 5. mailto:detomaso-bounces@server.detomasolist.com 6. mailto:detomaso@server.detomasolist.com 7. mailto:nick.mcintosh.sr@gmail.com 8. mailto:DeTomaso@server.detomasolist.com 9. http://server.detomasolist.com/mailman/listinfo/detomaso 10. mailto:DeTomaso@server.detomasolist.com 11. http://server.detomasolist.com/mailman/listinfo/detomaso 12. mailto:DeTomaso@server.detomasolist.com 13. http://server.detomasolist.com/mailman/listinfo/detomaso
Does anyone know what would cause a condenser ran relay to go bad? I replaced one and a year later its bad again. Nick 7252 _______________________________________________
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Good morning Nick. Aside from the possibility you got a bad relay, the only other thing I can come up with is the fact that the condenser fan fights the ambient air pressure gradient when these cars are cruising at speed. Folks have commented in the past that the air-flow through the condenser (with the fan going) deadheads around 80 mph. My work with pressure gauges and anemometers confirmed this observation. Easiest way to reduce strain on the fan (and the current it draws) is to reverse the wires going to the fan. Hope this makes sense and perhaps helps. Stephen Nelson -----Original Message----- From: DeTomaso [mailto:detomaso-bounces@server.detomasolist.com] On Behalf Of Mike Drew via DeTomaso Sent: Wednesday, June 29, 2016 10:48 AM To: nick mcintosh sr <nick.mcintosh.sr@gmail.com> Cc: detomaso@server.detomasolist.com Subject: Re: [DeTomaso] Condenser relay Nick, More info please. Is it a stock relay or a modern replacement? Stock location, inside the cabin? Stock fan? I don't have any answers but more info might help the electrically smart people come up with the answer? Mike Sent from my iPhone On Jun 29, 2016, at 10:25, nick mcintosh sr <nick.mcintosh.sr@gmail.com> wrote: the links above.
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Nick, Back in the day I would service school clock systems. They were impulse systems, once a minute the relay could close for 3 seconds (that is 1440 times a day). They were 24 VDC with high amp draw. When a contact opens you will get a small arch across the contacts, doing harm to them. Now the rest of the story... Let's think about your old original distributor. In there you had points (contacts) and a CONDENCER. The job of the condenser was to absorb some of the arch that would want to jump across the points (contacts) keeping them from burning up. In the schools I would install a condenser and resistor(bleeds off the power in the capacitor)to save the contacts. What you need to do is buy a bigger better really. But now you know why... Larry (well you asked) - Cleveland -----Original Message----- From: DeTomaso [mailto:detomaso-bounces@server.detomasolist.com] On Behalf Of nick mcintosh sr Sent: Wednesday, June 29, 2016 1:25 PM To: detomaso@server.detomasolist.com Subject: [DeTomaso] Condenser relay Does anyone know what would cause a condenser ran relay to go bad? I replaced one and a year later its bad again. Nick 7252
participants (6)
-
Joseph F. Byrd, Jr. -
Larry - Ohio Time -
Mike Drew -
nick mcintosh sr -
Rob Dumoulin -
Stephen