Hello,

I have a relatively new NT-34 and the A/C does not work with the engine
running. However, it works with the generator on and engine off. Is that
normal?

Rick

Is your A/C a12 volt system? I doubt it. It needs 120 volts, either from dock power cord or from your generator. 
Barry Shapiro

Sent from the all new AOL app for iOS

On Tuesday, June 23, 2026, 4:48 PM, Rick Miller via Sentoa sentoa@lists.sentoa.org wrote:

Hello,

I have a relatively new NT-34 and the A/C does not work with the engine running. However, it works with the generator on and engine off. Is that normal?

Rick

Sentoa mailing list -- sentoa@lists.sentoa.org
To unsubscribe send an email to sentoa-leave@lists.sentoa.org

In checking, A/C is on 120 Volt side. I should add that the engine shuts off when I turn on generator to run A/C.

From: Barry Shapiro bshap72181@aol.com
Sent: Tuesday, June 23, 2026 4:55 PM
To: South East Nordic Tugs Owners' Association (SENTOA) sentoa@lists.sentoa.org
Cc: rbmiller@erols.com
Subject: Re: [Sentoa] A/C not working with engine on

Is your A/C a12 volt system? I doubt it. It needs 120 volts, either from dock power cord or from your generator.

Barry Shapiro

https://aolapp.onelink.me/eG2g?pid=NativePlacement&c=US_Acquisition_YMktg_320_EmailSignature_AttributionDL&af_sub1=Acquisition&af_sub2=US_YMktg&af_sub3=&af_sub4=100002473&af_sub5=SentFromNewAOLApp__Interstitial_&af_ios_store_cpp=ce85ce34-ad0f-4811-a92b-a172743b064e&af_android_url=https%3A%2F%2Fplay.google.com%2Fstore%2Fapps%2Fdetails%3Fid%3Dcom.aol.mobile.aolapp%26listing%3Demail_signature_attribution Sent from the all new AOL app for iOS

On Tuesday, June 23, 2026, 4:48 PM, Rick Miller via Sentoa <sentoa@lists.sentoa.org mailto:sentoa@lists.sentoa.org > wrote:

Hello,

I have a relatively new NT-34 and the A/C does not work with the engine running. However, it works with the generator on and engine off. Is that normal?

Rick

Sentoa mailing list -- sentoa@lists.sentoa.org mailto:sentoa@lists.sentoa.org
To unsubscribe send an email to sentoa-leave@lists.sentoa.org mailto:sentoa-leave@lists.sentoa.org

My AC on 37-116 runs on 120 volt, I have to have generator running or on shore power.Presume your AC is the same.

Carpe Diem

37-116

Commencement Bay, Washington

Sent from my iPadRick Schmidtke

On Jun 23, 2026, at 1:59 PM, Rick Miller via Sentoa <sentoa@lists.sentoa.org> wrote:

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div.WordSection1 { page: WordSection1; }In checking, A/C is on 120 Volt side. I should add that the engine shuts off when I turn on generator to run A/C.

From: Barry Shapiro <bshap72181@aol.com>
Sent: Tuesday, June 23, 2026 4:55 PM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.org>
Cc: rbmiller@erols.com
Subject: Re: [Sentoa] A/C not working with engine on

Is your A/C a12 volt system? I doubt it. It needs 120 volts, either from dock power cord or from your generator.

Barry Shapiro

Sent from the all new AOL app for iOS

On Tuesday, June 23, 2026, 4:48 PM, Rick Miller via Sentoa <sentoa@lists.sentoa.org> wrote:

Hello,

I have a relatively new NT-34 and the A/C does not work with the engine running. However, it works with the generator on and engine off. Is that normal?

Rick

_______________________________________________
Sentoa mailing list -- sentoa@lists.sentoa.org
To unsubscribe send an email to sentoa-leave@lists.sentoa.org

_______________________________________________
Sentoa mailing list -- sentoa@lists.sentoa.org
To unsubscribe send an email to sentoa-leave@lists.sentoa.org

In checking, A/C is on 120 Volt side. I should add that the engine shuts off when I turn on generator to run A/C.

That is clearly not right. Normally the only connection between the main engine and the generator is the automatic shutoff control for the fire extinguisher system. Fireboy or similar.

If the generator and engine won’t run at the same time it means there is either a serious wiring problem (not too likely) or there is fuel starvation due to clogged filters or clogged tank pickup. Filters are usually completely separate.

Gene Fuller

Yorkshire Rose

NT 37-136

Punta Gorda, FL

Rick

It would be helpful to see a clear, simple Operating State Table:

AC                        Engine                Shore Power                    Generator

ON                        ON                        Disconnected                  OFF
OFF                      OFF                      Connected                        ON
.
.
.

No offense intended, but we humans do not typically take a systemic and data gathering approach so I usually make a little chart like this and the answer often jumps right out.

The exercise also forces on to run down all of the use cases/combinations which is critical for good diagnostic and for engaging others.

Just my two cents

Richard

From: Rick Schmidtke via Sentoa sentoa@lists.sentoa.org
Sent: Tuesday, June 23, 2026 6:19 PM
To: sentoa@lists.sentoa.org
Cc: Rick Schmidtke fhschmidtke@gmail.com
Subject: [Sentoa] Re: A/C not working with engine on

My AC on 37-116 runs on 120 volt, I have to have generator running or on shore power.
Presume your AC is the same.

Carpe Diem
37-116
Commencement Bay, Washington

Sent from my iPad
Rick Schmidtke

On Jun 23, 2026, at 1:59 PM, Rick Miller via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org> wrote:

In checking, A/C is on 120 Volt side. I should add that the engine shuts off when I turn on generator to run A/C.

From: Barry Shapiro <bshap72181@aol.commailto:bshap72181@aol.com>
Sent: Tuesday, June 23, 2026 4:55 PM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Cc: rbmiller@erols.commailto:rbmiller@erols.com
Subject: Re: [Sentoa] A/C not working with engine on

Is your A/C a12 volt system? I doubt it. It needs 120 volts, either from dock power cord or from your generator.

Barry Shapiro

Sent from the all new AOL app for iOShttps://aolapp.onelink.me/eG2g?pid=NativePlacement&c=US_Acquisition_YMktg_320_EmailSignature_AttributionDL&af_sub1=Acquisition&af_sub2=US_YMktg&af_sub3=&af_sub4=100002473&af_sub5=SentFromNewAOLApp__Interstitial_&af_ios_store_cpp=ce85ce34-ad0f-4811-a92b-a172743b064e&af_android_url=https%3A%2F%2Fplay.google.com%2Fstore%2Fapps%2Fdetails%3Fid%3Dcom.aol.mobile.aolapp%26listing%3Demail_signature_attribution

On Tuesday, June 23, 2026, 4:48 PM, Rick Miller via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org> wrote:

Hello,

I have a relatively new NT-34 and the A/C does not work with the engine running. However, it works with the generator on and engine off. Is that normal?

Rick

Sentoa mailing list -- sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org
To unsubscribe send an email to sentoa-leave@lists.sentoa.orgmailto:sentoa-leave@lists.sentoa.org

Sentoa mailing list -- sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org
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