[TR] TR 250 Heater problem

[Roger Elliott]

I think, it must be the seals.  I am going to try to get a look at it 
with my inspection camera, but I don't think I will be able to get it 
inside the box.

I am afraid the only thing to correct it, is taking out the heater box 
and rebuilding it.

I don't think it could be a mouse nest, from what I can see.

Roger

On 12/20/18 7:06 AM, DAVID MASSEY wrote:
> Two things come to mind.
>
> 1) Air is bypassing the core on that side. It has been years since I 
> took one apart.  Is there a foam piece sealing off the gap between the 
> core and the sheetmetal housing that has perished?
>
> 2) The core is partially clogged.  Certainly there is some flow but 
> some tubes may be clogged leaving a portion of the core cool and, 
> hence, the air is not heated. (Actually, I have a little difficulty 
> with this one since the tubes run right-to-left and if there were 
> clogged tubes the problem would be symmetrical.  But still worth 
> looking into it.)
>
> Dave
On 12/20/18 7:06 AM, DAVID MASSEY wrote:
> Two things come to mind.
>
> 1) Air is bypassing the core on that side. It has been years since I 
> took one apart.  Is there a foam piece sealing off the gap between the 
> core and the sheetmetal housing that has perished?
>
> 2) The core is partially clogged.  Certainly there is some flow but 
> some tubes may be clogged leaving a portion of the core cool and, 
> hence, the air is not heated. (Actually, I have a little difficulty 
> with this one since the tubes run right-to-left and if there were 
> clogged tubes the problem would be symmetrical.  But still worth 
> looking into it.)
>
> Dave
>
>
>
> -----Original Message-----
> From: Roger Elliott <elliottr at rmi.net>
> To: triumphs <triumphs at autox.team.net>
> Sent: Wed, Dec 19, 2018 5:13 pm
> Subject: [TR] TR 250 Heater problem
>
> Hi,
>
> We were out in my wife's TR 250 the other night and the heater was
> acting up on the passenger side.
>
> The defroster vent seemed to be hot on the right side of the passenger
> vent, but cold on the left side (the driver's defroster vent was fine.)
>
> The air from the floor vent on the passenger side was cold, the driver's
> side was fine - at least until a coat was shoved under the passenger
> side which then diverted the cold to the driver's side.
>
> We took out the glove box and all of the hoses are hooked up correctly.
>
> I can't think of anything that would allow the air coming from the
> defroster vent be cold on one side and hot (well okay warm) on the other
> side. The only thing I can think of is that the seal around the heater
> core is letting cold air past on the passenger side.
>
> Any ideas?
>
> Thanks,
> Roger Elliott
>
>
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