Dometic Fridge Frame Heater (1 Viewer)

[a900ss]

Hi,

Does anyone know if the frame heater on a Dometic 3 way fridge (RMT 7655 to exact) uses the leisure batteries or vehicle battery for power.

I’m hoping leisure but just want to check.

Thanks.

 

[Two on Tour]

What do you mean by "frame heater" ?, if you mean the 12v heating element, then that is powered by the vehicle battery when the engine is running and in some f/f's it can be via solar.

 

[dunnah01]

Our RMD8505 only works on EHU 240v

 

[dunnah01]

What do you mean by "frame heater" ?, if you mean the 12v heating element, then that is powered by the vehicle battery when the engine is running and in some f/f's it can be via solar.

The frame heater heats the door frame around the upper freezer compartment to reduce condensation which can drip into the display PCB and fry it

 

[bigtwin]

I’m hoping leisure but just want to check.

It must be the leisure battery, otherwise it wouldn’t be available when you need it. However, I can’t say that definitively.

Ian

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[GeoffnDee]

It runs from the permanently DC connection which is also used for the control/power module and the leisure battery is normally used for this supply.

 

[Dave and Jen]

Well that's a couple of confusing answers, I didn't comment because I'm not sure....
Cheers, Dave

 

[Jwats]

The frame heater is automatically on when on 240v or on 12v (engine running) as it knows you have power to spare while a power supply is active. When you are on gas you need to manually turn it on with the button and then it will be running on the leisure battery

 

[bigtwin]

Well that's a couple of confusing answers, I didn't comment because I'm not sure....
Cheers, Dave

Which couple?

Ian

 

[dunnah01]

Well that's a couple of confusing answers, I didn't comment because I'm not sure....
Cheers, Dave

I think you did comment

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[Dave and Jen]

Which couple?

Ian

Yours and geoffandee's
Dave

 

[Dave and Jen]

I think you did comment

Not to the OP's question though.
Dave

 

[bigtwin]

Yours and geoffandee's
Dave

And it transpires that they were both correct. Why did you find them confusing?

Ian

 

[Dave and Jen]

And it transpires that they were both correct. Why did you find them confusing?

Ian

I thought the fridge on 12v was only when the engine is running and therefore powered by the engine battery, so I am wrong? If so, today's been another learning day!
Cheers, Dave.
ps by the way @TwoonTour also said the same....

 

[bigtwin]

I thought the fridge on 12v was only when the engine is running and therefore powered by the engine battery, so I am wrong? If so, today's been another learning day!
Cheers, Dave.
ps by the way @TwoonTour also said the same....

You are referring to the 12V heating element. The question was asking about the supply for the Frame Heater.

Ian

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[Jwats]

99% of fridges run off the leisure when the engine is running, when engine is started the D+ (alternator live or simulated D+ on smart alternators) triggers a relay which lets the 12v (leisure) reach the elements in the fridge. Yes the charge is coming from the alternator but the fridge itself is nearly always on the leisure battery circuit

 

[GeoffnDee]

The leisure battery is used to power the fridge control electronics (and , in the case of a Dometic RMT7655 , the frame heater) with the starter battery , when the engine is running , used to power the fridge 12v heater element.

I thought the fridge on 12v was only when the engine is running and therefore powered by the engine battery, so I am wrong? If so, today's been another learning day!
Cheers, Dave.
ps by the way @TwoonTour also said the same....

 

[Dave and Jen]

You are referring to the 12V heating element. The question was asking about the supply for the Frame Heater.

Ian

Like I said -a learning day, I've never even heard of a frame heater until now.
Goodnight
Dave

 

[a900ss]

The leisure battery is used to power the fridge control electronics (and , in the case of a Dometic RMT7655 , the frame heater) with the starter battery , when the engine is running , used to power the fridge 12v heater element.

Perfect. Thanks.

 

[Lenny HB]

The OP's van is a Hymer so the fridge will run from the leisure battery when switched to 12v so the frame heater will run from the leisure battery.

There is a changeover relay in the EBL so emwhen the engine is running g the fridge runs from the starter battery and when the
engine is not running the fridge runs from the leisure battery.

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[a900ss]

The OP's van is a Hymer so the fridge will run from the leisure battery when switched to 12v so the frame heater will run from the leisure battery.

There is a changeover relay in the EBL so emwhen the engine is running g the fridge runs from the starter battery and when the
engine is not running the fridge runs from the leisure battery.

Thanks.