Coolant alarm

Technical questions and answers about the Mazda Bongo

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Tombo
Apprentice Bongonaut
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Joined: Thu Jul 23, 2020 8:46 pm
Location: Bedfordshire

Coolant alarm

Post by Tombo » Sun Nov 22, 2020 12:29 am

Hi all, I've had my bongo (2000, diesel, 4wd) less than a month and was checking fluids this morning, squeezed a coolant hose, all doors open both front seats up and the haydn coolant alarm went off for 5-10 minutes. Keys not in ignition. I put the key in and turned and heard a second alarm( a beep beep beep sound) Checked the expansion tank and the coolant was showing just above the screw. Topped it up and alarm continued. Tentatively started the engine and the alarm turned off after a few seconds.

I have noticed that the alarm does 1 test beep only when I start the engine and that can last between short pip or 1-2 second beep. Normally a short pip.

Can anyone help me understand what's going on here? Should alarm sound with keys out of ignition?
And i assume it's OK to drive if the expansion tank is full and the alarm isn't going off?

Thanks in advance for your wisdom!
2.5 Diesel, 4wd AFT born in 2000
Bob
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Re: Coolant alarm

Post by Bob » Sun Nov 22, 2020 12:58 am

Haydn will likely spot this and reply, but if you Google 'Haydn Alarms' the contact details are there.

Their after sales service is the very best, and I'm certain Haydn and Jo will sort it. :wink:
Tombo
Apprentice Bongonaut
Posts: 9
Joined: Thu Jul 23, 2020 8:46 pm
Location: Bedfordshire

Re: Coolant alarm

Post by Tombo » Sun Nov 22, 2020 12:58 pm

Thanks for the reply!
I did email them about the short test beep and haven't receive a reply yet so thought I'd try here. I couldn't find anything with searches on here.
I'll keep looking
Tom
2.5 Diesel, 4wd AFT born in 2000
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g8dhe
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Re: Coolant alarm

Post by g8dhe » Sun Nov 22, 2020 1:02 pm

Search under the top bar to the left side;
searchBF.jpg
Geoff
97 V6, AFT, full side conversion.
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Tombo
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Posts: 9
Joined: Thu Jul 23, 2020 8:46 pm
Location: Bedfordshire

Re: Coolant alarm

Post by Tombo » Sun Nov 22, 2020 2:42 pm

Sorry I meant I searched and couldn't find anything!
2.5 Diesel, 4wd AFT born in 2000
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haydn callow
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Re: Coolant alarm

Post by haydn callow » Mon Nov 23, 2020 2:02 pm

Hi, the alarm should only beep when you turn the ignition on and again when you turn key to start, the only other time you should hear it is when the coolant is low.
New Red antifreeze can cause problems but not what’s happening to you.
Weak coolant, same as above.
Are you sure it’s the coolant alarm that is sounding ? There are loads of other things in a Bongo that beep.
If it is the alarm it sounds as though it’s wired in wrong, it should be connected to a ign switched live. Yours must be wired to a permanent live....you need to correct this and report back.
http://www.coolantalarm.co.uk
Developer of the Mazda Bongo Coolant loss Alarm
Also BMW Clocks
Tombo
Apprentice Bongonaut
Posts: 9
Joined: Thu Jul 23, 2020 8:46 pm
Location: Bedfordshire

Re: Coolant alarm

Post by Tombo » Mon Nov 23, 2020 6:59 pm

Thanks for your help, I can see the orange wire going from the expansion tank and it disappears off behind the dash. I'll have a look at the weekend when there's a bit of daylight!
The coolant alarm led lights up when it's going off so I assume it's that.
Tom
2.5 Diesel, 4wd AFT born in 2000