Fuel Burning Heater model's

gbsh · 3rd March 2015, 16:55

Hi,

I'm looking at replace my FBH as the one I have is on it's death bed.
The model number of mine is Thermo Top Z/C - D. Can anyone tell me the difference between that and a model number Thermo Top C, and will the latter fit in our cars? Thanks.

Regards
Gary

GeoffWW · 4th March 2015, 09:15

What is wrong with your FBH for you to make the above statement? It is a simple heater, but any one of various safety controls can stop it working.

The Thermo Top Z/C - D comes in two models for our diesel cars. The earlier has a serial number starting with "6" and the later one with a number "9". Do a search on the forum for FBH.

There are slight differences with the PCB's for each model, which are highlighted in the mountain of information from various contributors, showing anything you wish to do with your heater from an "almost coolant loss-free removal", through to a full strip down and "decoke", and not forgetting elec repairs to the PCB at a very reasonable price by Frenchmike.

There is information there for upgrading the controls from the baseline auto start below 5 degree's C to timers, remote control, and including starting the ATC

I am not sure whether the model you are suggesting to change to will fit anyway. From memory, it is much longer than the Thermo Top Z/C-D and probably won't fit anyway.

I see you have been a member of the Forum for over 3 years. Don't lose heart. With all the information and help available here from Forum members, you should be able to get your present FBH running again at much less cost than buying your suggested replacement, even if it will fit.

First thing to answer is " what is wrong with it"?
Has it ever worked previously?
What happened when it last worked?
Will it actually go into the pre-start check phase now?
Do the electronics need resetting with the under bonnet fuse F8 20 amps?
Does it complete the pre-start check and purge system? About three minutes.
See Frenchmikes graph showing the timing for the various components - waterpump, the FBH fuel pump, water flow, flame sensor etc kicking in and being checked as working. Faults with any one of these will stop the heater going into the main "firing up" stage

If it gets through this stage, can you hear the heater building up to full power?
Or does it make masses of smoke?

As stated earlier, Don't lose heart, Keep your present heater and sort it out.

Best of luck

gbsh · 4th March 2015, 10:02

Thanks for the info. I'll start reading and see what can be done.

Regards
Gary

GeoffWW · 4th March 2015, 10:37

Hello gbsh,

Glad to see you have seen my entry already. Which of my questions can you answer now, and what are the answers?

Geoff

HarryM1BYT · 4th March 2015, 11:23

Quote:

Originally Posted by gbsh

Thanks for the info. I'll start reading and see what can be done.

Regards
Gary

Much of what you need to know about the FBH is here..

http://www.the75andztclub.co.uk/foru...768#post877768

3rd March 2015, 16:55	#1
gbsh Regular poster Rover 75 Tourer Mk1 Join Date: Nov 2011 Location: Worksop Posts: 76 Thanks: 1 Thanked 4 Times in 4 Posts	Fuel Burning Heater model's Hi, I'm looking at replace my FBH as the one I have is on it's death bed. The model number of mine is Thermo Top Z/C - D. Can anyone tell me the difference between that and a model number Thermo Top C, and will the latter fit in our cars? Thanks. Regards Gary

4th March 2015, 09:15	#2
GeoffWW Loves to post Rover 75 CDTi Tourer Connoisseur SE Auto, Also fully restored Mk 2 1966 MG Midget Join Date: Apr 2007 Location: Manchester Posts: 314 Thanks: 49 Thanked 59 Times in 46 Posts	FBH on deathbed What is wrong with your FBH for you to make the above statement? It is a simple heater, but any one of various safety controls can stop it working. The Thermo Top Z/C - D comes in two models for our diesel cars. The earlier has a serial number starting with "6" and the later one with a number "9". Do a search on the forum for FBH. There are slight differences with the PCB's for each model, which are highlighted in the mountain of information from various contributors, showing anything you wish to do with your heater from an "almost coolant loss-free removal", through to a full strip down and "decoke", and not forgetting elec repairs to the PCB at a very reasonable price by Frenchmike. There is information there for upgrading the controls from the baseline auto start below 5 degree's C to timers, remote control, and including starting the ATC I am not sure whether the model you are suggesting to change to will fit anyway. From memory, it is much longer than the Thermo Top Z/C-D and probably won't fit anyway. I see you have been a member of the Forum for over 3 years. Don't lose heart. With all the information and help available here from Forum members, you should be able to get your present FBH running again at much less cost than buying your suggested replacement, even if it will fit. First thing to answer is " what is wrong with it"? Has it ever worked previously? What happened when it last worked? Will it actually go into the pre-start check phase now? Do the electronics need resetting with the under bonnet fuse F8 20 amps? Does it complete the pre-start check and purge system? About three minutes. See Frenchmikes graph showing the timing for the various components - waterpump, the FBH fuel pump, water flow, flame sensor etc kicking in and being checked as working. Faults with any one of these will stop the heater going into the main "firing up" stage If it gets through this stage, can you hear the heater building up to full power? Or does it make masses of smoke? As stated earlier, Don't lose heart, Keep your present heater and sort it out. Best of luck

4th March 2015, 10:02	#3
gbsh Regular poster Rover 75 Tourer Mk1 Join Date: Nov 2011 Location: Worksop Posts: 76 Thanks: 1 Thanked 4 Times in 4 Posts	Thanks for the info. I'll start reading and see what can be done. Regards Gary

4th March 2015, 10:37	#4
GeoffWW Loves to post Rover 75 CDTi Tourer Connoisseur SE Auto, Also fully restored Mk 2 1966 MG Midget Join Date: Apr 2007 Location: Manchester Posts: 314 Thanks: 49 Thanked 59 Times in 46 Posts	Hello gbsh, Glad to see you have seen my entry already. Which of my questions can you answer now, and what are the answers? Geoff