Instant heat?

waterboatman · Dec 20, 2011

Can anyone advise how long it should take a discovery td5 cabin heater to warm up from cold? Mine takes about 10 minutes. Is this normal or do I have a problem?
Isn't the heater diesel powered or does it rely on the engine warming up (this seems to be the case with mine).

Thanks in advance for any info.

jamesmartin · Dec 20, 2011

engine heating up .will take alot longer in cold weather ,some use rad muffs to reduce cooling from rad in cold weather

sierrafery · Dec 20, 2011

waterboatman said:
Can anyone advise how long it should take a discovery td5 cabin heater to warm up from cold? Mine takes about 10 minutes. Is this normal or do I have a problem?
Isn't the heater diesel powered or does it rely on the engine warming up (this seems to be the case with mine).

Thanks in advance for any info.

It depends... if yours is fitted with a FBH(fuel burning heater-optional for D2) then it takes too long and the FBH doesnt work. If no FBH 10 min is normal

waterboatman · Dec 20, 2011

Many thanks for the responses. Now the silly question - how do I know if I have a FBH?
Me thinks that as I am getting 33mpg at present maybe a new pair of thermals would be a better solution?

sierrafery · Dec 20, 2011

U have to see the unit if it's fitted:
"The FBH unit is installed on the bulkhead in the engine compartment, on the side opposite the brake servo, and is connected in series in the coolant supply to the heater assembly. Two electrical connectors on the top of the FBH unit connect to the vehicle wiring."

If it's fitted and doesnt work we'll speak again cos it is'nt so simple >
FBH system (where fitted)
The FBH system operates only while the engine is running and the ambient temperature is less than 5 °C (41 °F).
With the engine running and the ambient temperature below 5 °C (41 °F), the air temperature sensor connects the alternator power supply to the ECU in the FBH unit. On receipt of the alternator power supply, the ECU starts the circulation pump and, depending on the input from the temperature sensor in the heat exchanger, enters either a standby or active mode of operation. If the heat exchanger casing temperature is 65 °C (149 °F) or above, the ECU enters a standby mode of operation. If the heat exchanger casing temperature is below 65 °C (149 °F), the ECU enters an active mode of operation. In the standby mode, the ECU monitors the heat exchanger casing temperature and enters the active mode if it drops below 65 °C (149 °F). In the active mode, the ECU initiates a start sequence and then operates the system at full or part load combustion to provide the required heat input to the coolant.

1968unclefester · Dec 20, 2011

on my disco 1 i removed the viscous fan and it warms up a lot quicker , not sure if its a option on a disco 2 or not ?

chrimcne · Dec 21, 2011

Check your thermostat is OK - like 1968unclefester I removed the viscous fan in my 2000 D2. Doesn't overheat even in a jam.

Instant heat?

waterboatman

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jamesmartin

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sierrafery

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waterboatman

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sierrafery

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1968unclefester

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chrimcne

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